diff --git a/src/bugcollect/bugcollect.ts b/src/bugcollect/bugcollect.ts
new file mode 100644
index 0000000..8b9a15f
--- /dev/null
+++ b/src/bugcollect/bugcollect.ts
@@ -0,0 +1,244 @@
+/**
+ * BugCollect 崩溃收集 SDK
+ */
+
+import type { BugCollectOptions, BugCollectAPI, IssueEvent, LogEvent, Breadcrumb, DeviceInfo, LogLevel } from './types'
+import { computeFingerprint } from './fingerprint'
+import { startCrashCapture, stopCrashCapture } from './crash-capture'
+import { LogQueue } from './log-queue'
+import { trackFunnelEvent } from './funnel-tracker'
+
+const SDK_NAME = 'bugcollect.vue3'
+const SDK_VERSION = '1.0.0'
+const MAX_BREADCRUMBS = 50
+
+const LOG_LEVELS: Record<LogLevel, number> = {
+  debug: 0,
+  info: 1,
+  warn: 2,
+  error: 3,
+  none: 4,
+}
+
+let _options: BugCollectOptions | null = null
+let _queue: LogQueue | null = null
+let _breadcrumbs: Breadcrumb[] = []
+let _pendingErrors: IssueEvent[] = []
+let _initialized = false
+
+/**
+ * 初始化 BugCollect
+ */
+export function initBugCollect(options: BugCollectOptions): void {
+  if (_initialized) return
+  _options = {
+    release: '1.0.0',
+    environment: 'production',
+    logLevel: 'warn',
+    ...options,
+  }
+  _queue = new LogQueue(_options.appKey, _options.baseUrl)
+  _initialized = true
+
+  // 启动崩溃捕获
+  startCrashCapture((error, tags) => {
+    captureError(error, tags)
+  })
+
+  // 刷新待处理的错误
+  flushPendingErrors()
+}
+
+/**
+ * 捕获错误
+ */
+export function captureError(error: Error, tags?: Record<string, unknown>, fingerprint?: string): void {
+  const event = buildIssueEvent('error', error, tags, fingerprint)
+
+  if (!_initialized) {
+    _pendingErrors.push(event)
+    return
+  }
+
+  flushPendingErrors()
+  _queue?.push(event)
+}
+
+/**
+ * 捕获致命错误
+ */
+export function captureCrash(error: Error, tags?: Record<string, unknown>): void {
+  if (!_initialized) return
+  _queue?.push(buildIssueEvent('fatal', error, tags))
+}
+
+/**
+ * 记录事件
+ */
+export function event(name: string, properties?: Record<string, unknown>): void {
+  if (!_initialized || !_options) return
+
+  const logEvent: LogEvent = {
+    type: 'event',
+    eventId: generateUuid(),
+    name,
+    properties,
+    appKey: _options.appKey,
+    userId: _options.userId,
+    platform: 'web',
+    release: _options.release ?? '1.0.0',
+    environment: _options.environment ?? 'production',
+    device: buildDeviceInfo(),
+    sdk: { name: SDK_NAME, version: SDK_VERSION },
+  }
+
+  _queue?.push(logEvent)
+  trackFunnelEvent(name, properties)
+}
+
+/**
+ * 添加面包屑
+ */
+export function addBreadcrumb(category: string, message: string, level = 'info', data?: Record<string, unknown>): void {
+  if (_breadcrumbs.length >= MAX_BREADCRUMBS) {
+    _breadcrumbs.shift()
+  }
+  _breadcrumbs.push({
+    timestamp: Date.now(),
+    category,
+    message,
+    level,
+    data,
+  })
+}
+
+/**
+ * 记录警告
+ */
+export function warn(message: string, tags?: Record<string, unknown>): void {
+  if (!_initialized || !_options) return
+  if (LOG_LEVELS[_options.logLevel ?? 'warn'] > LOG_LEVELS.warn) return
+
+  const issueEvent: IssueEvent = {
+    type: 'issue',
+    eventId: generateUuid(),
+    level: 'warning',
+    platform: 'web',
+    fingerprint: '', // will be computed
+    appKey: _options.appKey,
+    exception: { type: 'Warning', value: message },
+    breadcrumbs: [..._breadcrumbs],
+    release: _options.release ?? '1.0.0',
+    environment: _options.environment ?? 'production',
+    userId: _options.userId,
+    device: buildDeviceInfo(),
+    tags,
+    sdk: { name: SDK_NAME, version: SDK_VERSION },
+  }
+
+  // Compute fingerprint async
+  computeFingerprint('Warning', message, '').then(fp => {
+    issueEvent.fingerprint = fp
+    _queue?.push(issueEvent)
+  })
+}
+
+/**
+ * 记录信息
+ */
+export function info(message: string, tags?: Record<string, unknown>): void {
+  if (!_initialized || !_options) return
+  if (LOG_LEVELS[_options.logLevel ?? 'warn'] > LOG_LEVELS.info) return
+  event('__log_info', { ...tags, message })
+}
+
+/**
+ * 刷新队列
+ */
+export async function flush(): Promise<void> {
+  await _queue?.flush()
+}
+
+/**
+ * 销毁
+ */
+export function destroy(): void {
+  stopCrashCapture()
+  _queue?.destroy()
+  _queue = null
+  _breadcrumbs = []
+  _initialized = false
+}
+
+/**
+ * 构建 IssueEvent
+ */
+function buildIssueEvent(level: IssueEvent['level'], error: Error, tags?: Record<string, unknown>, fingerprint?: string): IssueEvent {
+  const stacktrace = error.stack ?? ''
+
+  const event: IssueEvent = {
+    type: 'issue',
+    eventId: generateUuid(),
+    level,
+    platform: 'web',
+    fingerprint: fingerprint ?? '', // will be computed async
+    appKey: _options?.appKey ?? '',
+    exception: {
+      type: error.name ?? 'Error',
+      value: error.message ?? '',
+      stacktrace,
+    },
+    breadcrumbs: [..._breadcrumbs],
+    release: _options?.release ?? '1.0.0',
+    environment: _options?.environment ?? 'production',
+    userId: _options?.userId,
+    device: buildDeviceInfo(),
+    tags,
+    sdk: { name: SDK_NAME, version: SDK_VERSION },
+  }
+
+  // Compute fingerprint async
+  if (!fingerprint) {
+    computeFingerprint(error.name ?? 'Error', error.message ?? '', stacktrace).then(fp => {
+      event.fingerprint = fp
+    })
+  }
+
+  return event
+}
+
+/**
+ * 构建设备信息
+ */
+function buildDeviceInfo(): DeviceInfo {
+  return {
+    userAgent: typeof navigator !== 'undefined' ? navigator.userAgent : undefined,
+    locale: typeof navigator !== 'undefined' ? navigator.language : undefined,
+    timezone: Intl.DateTimeFormat().resolvedOptions().timeZone,
+    screenWidth: typeof screen !== 'undefined' ? screen.width : undefined,
+    screenHeight: typeof screen !== 'undefined' ? screen.height : undefined,
+  }
+}
+
+/**
+ * 刷新待处理的错误
+ */
+function flushPendingErrors(): void {
+  if (_pendingErrors.length === 0) return
+  const errors = [..._pendingErrors]
+  _pendingErrors = []
+  for (const error of errors) {
+    _queue?.push(error)
+  }
+}
+
+/**
+ * 生成 UUID
+ */
+function generateUuid(): string {
+  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, (c) => {
+    const r = (Math.random() * 16) | 0
+    const v = c === 'x' ? r : (r & 0x3) | 0x8
+    return v.toString(16)
+  })
+}
diff --git a/src/bugcollect/crash-capture.ts b/src/bugcollect/crash-capture.ts
new file mode 100644
index 0000000..e55e894
--- /dev/null
+++ b/src/bugcollect/crash-capture.ts
@@ -0,0 +1,40 @@
+/**
+ * Web 端崩溃捕获器
+ */
+
+type ErrorHandler = (error: Error, tags?: Record<string, unknown>) => void
+
+let _started = false
+let _handler: ErrorHandler | null = null
+
+/**
+ * 启动崩溃捕获
+ */
+export function startCrashCapture(handler: ErrorHandler): void {
+  if (_started) return
+  _started = true
+  _handler = handler
+
+  // 捕获未处理的错误
+  window.addEventListener('error', (event) => {
+    if (event.error) {
+      handler(event.error, { type: 'uncaught_error', filename: event.filename, lineno: event.lineno, colno: event.colno })
+    }
+  })
+
+  // 捕获未处理的 Promise rejection
+  window.addEventListener('unhandledrejection', (event) => {
+    const error = event.reason instanceof Error
+      ? event.reason
+      : new Error(String(event.reason))
+    handler(error, { type: 'unhandled_rejection' })
+  })
+}
+
+/**
+ * 停止崩溃捕获
+ */
+export function stopCrashCapture(): void {
+  _started = false
+  _handler = null
+}
diff --git a/src/bugcollect/fingerprint.ts b/src/bugcollect/fingerprint.ts
new file mode 100644
index 0000000..73fd03e
--- /dev/null
+++ b/src/bugcollect/fingerprint.ts
@@ -0,0 +1,38 @@
+/**
+ * 错误指纹计算
+ */
+
+/**
+ * 计算错误指纹
+ */
+export async function computeFingerprint(type: string, message: string, stacktrace?: string): Promise<string> {
+  const normalizedMessage = normalizeMessage(message)
+  const top3Frames = extractTop3Frames(stacktrace)
+  const raw = `${type}:${normalizedMessage}:${top3Frames}`
+
+  const encoder = new TextEncoder()
+  const data = encoder.encode(raw)
+  const hashBuffer = await crypto.subtle.digest('SHA-256', data)
+  const hashArray = Array.from(new Uint8Array(hashBuffer))
+  return hashArray.map(b => b.toString(16).padStart(2, '0')).join('')
+}
+
+/**
+ * 归一化消息（数字替换为 N，长 hex 替换为 H）
+ */
+function normalizeMessage(message: string): string {
+  return message
+    .replace(/\d+/g, 'N')
+    .replace(/[0-9a-fA-F]{8,}/g, 'H')
+}
+
+/**
+ * 提取堆栈顶部帧
+ */
+function extractTop3Frames(stacktrace?: string): string {
+  if (!stacktrace) return ''
+  return stacktrace
+    .split('\n')
+    .slice(0, 3)
+    .join('|')
+}
diff --git a/src/bugcollect/funnel-tracker.ts b/src/bugcollect/funnel-tracker.ts
new file mode 100644
index 0000000..ed13c81
--- /dev/null
+++ b/src/bugcollect/funnel-tracker.ts
@@ -0,0 +1,26 @@
+/**
+ * 漏斗追踪器
+ */
+
+const sessions = new Map<string, string[]>()
+
+/**
+ * 追踪事件
+ */
+export function trackFunnelEvent(name: string, properties?: Record<string, unknown>): void {
+  // 简化实现，后续可扩展
+}
+
+/**
+ * 获取当前会话的事件序列
+ */
+export function getSessionEvents(sessionId: string): string[] {
+  return sessions.get(sessionId) ?? []
+}
+
+/**
+ * 清除会话
+ */
+export function clearSession(sessionId: string): void {
+  sessions.delete(sessionId)
+}
diff --git a/src/bugcollect/index.ts b/src/bugcollect/index.ts
new file mode 100644
index 0000000..7713126
--- /dev/null
+++ b/src/bugcollect/index.ts
@@ -0,0 +1,6 @@
+/**
+ * BugCollect 模块导出
+ */
+
+export { initBugCollect, captureError, captureCrash, event, addBreadcrumb, warn, info, flush, destroy } from './bugcollect'
+export type { BugCollectOptions, BugCollectAPI, IssueEvent, LogEvent, ExceptionInfo, UserInfo, DeviceInfo, SdkInfo, Breadcrumb, LogLevel } from './types'
diff --git a/src/bugcollect/log-queue.ts b/src/bugcollect/log-queue.ts
new file mode 100644
index 0000000..ab606b9
--- /dev/null
+++ b/src/bugcollect/log-queue.ts
@@ -0,0 +1,150 @@
+/**
+ * 日志队列 - 内存队列 + 定时上传
+ */
+
+import type { IssueEvent, LogEvent } from './types'
+
+const BATCH_SIZE = 30
+const FLUSH_INTERVAL_MS = 10000
+const MAX_QUEUE_SIZE = 500
+const MAX_RETRY = 3
+const STORAGE_KEY = '@xuqm_bugcollect:queue'
+
+type Event = IssueEvent | LogEvent
+
+export class LogQueue {
+  private memory: Event[] = []
+  private flushTimer: ReturnType<typeof setInterval> | null = null
+  private retryCount = 0
+  private appKey: string
+  private baseUrl: string
+
+  constructor(appKey: string, baseUrl: string) {
+    this.appKey = appKey
+    this.baseUrl = baseUrl
+    this.flushTimer = setInterval(() => this.flush(), FLUSH_INTERVAL_MS)
+  }
+
+  /**
+   * 推送事件
+   */
+  push(event: Event): void {
+    if (this.shouldPersist(event)) {
+      const stored = this.readStored()
+      if (stored.length >= MAX_QUEUE_SIZE) stored.shift()
+      stored.push(event)
+      this.writeStored(stored)
+    } else {
+      if (this.memory.length >= MAX_QUEUE_SIZE) this.memory.shift()
+      this.memory.push(event)
+    }
+  }
+
+  /**
+   * 刷新队列
+   */
+  async flush(): Promise<void> {
+    const stored = this.readStored()
+    const combined = [...stored, ...this.memory]
+    if (combined.length === 0) return
+
+    const batch = combined.slice(0, BATCH_SIZE)
+    const storedUsed = Math.min(stored.length, BATCH_SIZE)
+    const memUsed = batch.length - storedUsed
+
+    // 乐观移除
+    this.writeStored(stored.slice(storedUsed))
+    this.memory.splice(0, memUsed)
+
+    const issues = batch.filter((e): e is IssueEvent => e.type === 'issue')
+    const events = batch.filter((e): e is LogEvent => e.type === 'event')
+
+    try {
+      if (issues.length > 0) {
+        await this.post('/bugcollect/v1/issues/batch', issues)
+      }
+      if (events.length > 0) {
+        await this.post('/bugcollect/v1/events/batch', events)
+      }
+      this.retryCount = 0
+    } catch {
+      this.retryCount++
+      if (this.retryCount < MAX_RETRY) {
+        const toRequeue = batch.filter(e => this.shouldPersist(e))
+        if (toRequeue.length > 0) {
+          const current = this.readStored()
+          this.writeStored([...toRequeue, ...current])
+        }
+      }
+    }
+  }
+
+  /**
+   * 销毁队列
+   */
+  destroy(): void {
+    if (this.flushTimer) {
+      clearInterval(this.flushTimer)
+      this.flushTimer = null
+    }
+  }
+
+  /**
+   * 判断是否需要持久化
+   */
+  private shouldPersist(event: Event): boolean {
+    return event.type === 'issue' && (event.level === 'fatal' || event.level === 'error')
+  }
+
+  /**
+   * 上传数据
+   */
+  private async post(path: string, data: Event[]): Promise<void> {
+    const body = JSON.stringify({
+      sentAt: new Date().toISOString(),
+      sdk: { name: 'bugcollect.vue3', version: '1.0.0' },
+      events: data,
+    })
+
+    const response = await fetch(`${this.baseUrl}${path}`, {
+      method: 'POST',
+      headers: {
+        'Content-Type': 'application/json',
+        'X-App-Key': this.appKey,
+      },
+      body,
+    })
+
+    if (!response.ok) {
+      throw new Error(`Upload failed: ${response.status}`)
+    }
+  }
+
+  /**
+   * 读取持久化队列
+   */
+  private readStored(): Event[] {
+    try {
+      const raw = localStorage.getItem(STORAGE_KEY)
+      if (!raw) return []
+      return JSON.parse(raw) as Event[]
+    } catch {
+      return []
+    }
+  }
+
+  /**
+   * 写入持久化队列
+   */
+  private writeStored(queue: Event[]): void {
+    try {
+      if (queue.length === 0) {
+        localStorage.removeItem(STORAGE_KEY)
+      } else {
+        localStorage.setItem(STORAGE_KEY, JSON.stringify(queue))
+      }
+    } catch {
+      // ignore
+    }
+  }
+}
diff --git a/src/bugcollect/types.ts b/src/bugcollect/types.ts
new file mode 100644
index 0000000..43785a0
--- /dev/null
+++ b/src/bugcollect/types.ts
@@ -0,0 +1,93 @@
+/**
+ * BugCollect 数据模型
+ */
+
+export interface IssueEvent {
+  type: 'issue'
+  eventId: string
+  level: 'fatal' | 'error' | 'warning' | 'info' | 'debug'
+  platform: string
+  fingerprint: string
+  appKey: string
+  exception?: ExceptionInfo
+  breadcrumbs?: Breadcrumb[]
+  release: string
+  environment: string
+  userId?: string
+  user?: UserInfo
+  device?: DeviceInfo
+  tags?: Record<string, unknown>
+  sdk?: SdkInfo
+}
+
+export interface LogEvent {
+  type: 'event'
+  eventId: string
+  name: string
+  properties?: Record<string, unknown>
+  appKey: string
+  userId?: string
+  platform: string
+  release: string
+  environment: string
+  device?: DeviceInfo
+  sdk?: SdkInfo
+}
+
+export interface ExceptionInfo {
+  type: string
+  value: string
+  stacktrace?: string
+}
+
+export interface UserInfo {
+  id: string
+}
+
+export interface DeviceInfo {
+  model?: string
+  manufacturer?: string
+  osName?: string
+  osVersion?: string
+  locale?: string
+  timezone?: string
+  userAgent?: string
+  screenWidth?: number
+  screenHeight?: number
+  buildType?: string
+}
+
+export interface SdkInfo {
+  name: string
+  version: string
+}
+
+export interface Breadcrumb {
+  timestamp: number
+  category: string
+  message: string
+  level: string
+  data?: Record<string, unknown>
+}
+
+export type LogLevel = 'debug' | 'info' | 'warn' | 'error' | 'none'
+
+export interface BugCollectOptions {
+  appKey: string
+  baseUrl: string
+  release?: string
+  environment?: string
+  logLevel?: LogLevel
+  userId?: string
+}
+
+export interface BugCollectAPI {
+  captureError(error: Error, tags?: Record<string, unknown>, fingerprint?: string): void
+  captureCrash(error: Error, tags?: Record<string, unknown>): void
+  event(name: string, properties?: Record<string, unknown>): void
+  addBreadcrumb(category: string, message: string, level?: string, data?: Record<string, unknown>): void
+  warn(message: string, tags?: Record<string, unknown>): void
+  info(message: string, tags?: Record<string, unknown>): void
+  flush(): Promise<void>
+  destroy(): void
+}
diff --git a/src/index.ts b/src/index.ts
index 418839c..3ad2742 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,6 +1,7 @@
 export { init, login, logout, setToken, setUserId, getToken, getUserId, getConfig } from './core/sdk'
 export { http } from './core/http'
 export { ImClient } from './im/ImClient'
+export { initBugCollect, captureError, captureCrash, event, addBreadcrumb, warn, info, flush, destroy } from './bugcollect'
 export {
   acceptFriendRequest,
   acceptGroupJoinRequest,
@@ -90,3 +91,4 @@ export type {
   ImEventMap,
   ApiResponse,
 } from './types'
+export type { BugCollectOptions, BugCollectAPI, IssueEvent, LogEvent, ExceptionInfo, UserInfo, DeviceInfo, SdkInfo, Breadcrumb, LogLevel } from './bugcollect'