http://www.dushu.com/zhuanti/guoxue/
四书五经：
论语
http://www.dushu.com/showbook/100165/
孟子
http://www.dushu.com/showbook/100167/
大学
http://www.dushu.com/showbook/100161/
中庸
http://www.dushu.com/showbook/100163/            
周易
http://www.dushu.com/showbook/100155/
诗经
http://www.dushu.com/showbook/100815/
尚书
http://www.dushu.com/showbook/100266/
礼记
http://www.dushu.com/showbook/100171/
春秋左传
http://www.dushu.com/showbook/100879/  

十三经注疏：
周易正义
http://www.dushu.com/showbook/100875/
尚书正义
http://www.dushu.com/showbook/100876/
毛诗正义
http://www.dushu.com/showbook/100877/
周礼注疏
http://www.dushu.com/showbook/100878/
仪礼注疏
http://www.dushu.com/showbook/100853/
左传正义
http://www.dushu.com/showbook/100879/
春秋公羊传注疏
http://www.dushu.com/showbook/100880/              
春秋穀梁传注疏
http://www.dushu.com/showbook/100881/  
论语注疏
http://www.dushu.com/showbook/100882/  
孝经注疏  
http://www.dushu.com/showbook/100883/
尔雅注疏  
http://www.dushu.com/showbook/100884/
孟子注疏  
http://www.dushu.com/showbook/100885/
礼记正义
http://www.dushu.com/showbook/100886/

二十五史：
史记  
http://www.dushu.com/showbook/100233/
汉书  
http://www.dushu.com/showbook/100234/
后汉书
http://www.dushu.com/showbook/100235/  
三国志  
http://www.dushu.com/showbook/100236/
晋书
http://www.dushu.com/showbook/100237/  
宋书  
http://www.dushu.com/showbook/100238/
南齐书
http://www.dushu.com/showbook/100239/               
梁书  
http://www.dushu.com/showbook/100240/
陈书  
http://www.dushu.com/showbook/100241/
魏书  
http://www.dushu.com/showbook/100242/
北齐书  
http://www.dushu.com/showbook/100243/
周书  
http://www.dushu.com/showbook/100244/
南史  
http://www.dushu.com/showbook/100246/
北史
http://www.dushu.com/showbook/100247/               
隋书  
http://www.dushu.com/showbook/100245/
旧唐书
http://www.dushu.com/showbook/100248/  
新唐书  
http://www.dushu.com/showbook/100249/
旧五代史
http://www.dushu.com/showbook/100250/  
新五代史  
http://www.dushu.com/showbook/100251/
宋史  
http://www.dushu.com/showbook/100252/
辽史
http://www.dushu.com/showbook/100253/                  
金史  
http://www.dushu.com/showbook/100254/
元史  
http://www.dushu.com/showbook/100255/
明史  
http://www.dushu.com/showbook/100256/
清史稿  
http://www.dushu.com/showbook/100257/

更多古籍在线阅读:
经部 http://www.dushu.com/zhuanti/guoxue/list/1011/
├　易类   
http://www.dushu.com/zhuanti/guoxue/list/1016/
├　书类   
http://www.dushu.com/zhuanti/guoxue/list/1017/
├　诗类   
http://www.dushu.com/zhuanti/guoxue/list/1018/
├　礼类   
http://www.dushu.com/zhuanti/guoxue/list/1019/
├　春秋类  
http://www.dushu.com/zhuanti/guoxue/list/1020/
├　孝经类  
http://www.dushu.com/zhuanti/guoxue/list/1021/
├　四书类  
http://www.dushu.com/zhuanti/guoxue/list/1023/
├　乐类   
http://www.dushu.com/zhuanti/guoxue/list/1024/
├　小学类  
http://www.dushu.com/zhuanti/guoxue/list/1025/


史部 http://www.dushu.com/zhuanti/guoxue/list/1012/
├　正史类
http://www.dushu.com/zhuanti/guoxue/list/1026/
├　编年类
http://www.dushu.com/zhuanti/guoxue/list/1027/
├　纪事本末类
http://www.dushu.com/zhuanti/guoxue/list/1028/
├　别史、杂史类
http://www.dushu.com/zhuanti/guoxue/list/1029/
├　诏令奏议类
http://www.dushu.com/zhuanti/guoxue/list/1030/
├　传记类
http://www.dushu.com/zhuanti/guoxue/list/1031/
├　史钞类
http://www.dushu.com/zhuanti/guoxue/list/1032/
├　载记类
http://www.dushu.com/zhuanti/guoxue/list/1033/
├　史评类
http://www.dushu.com/zhuanti/guoxue/list/1034/
├　时令类
http://www.dushu.com/zhuanti/guoxue/list/1035/
├　地理类
http://www.dushu.com/zhuanti/guoxue/list/1036/
├　职官类
http://www.dushu.com/zhuanti/guoxue/list/1037/
├　政书类
http://www.dushu.com/zhuanti/guoxue/list/1038/
├　目录类
http://www.dushu.com/zhuanti/guoxue/list/1039/
├　金石类
http://www.dushu.com/zhuanti/guoxue/list/1040/


子部 http://www.dushu.com/zhuanti/guoxue/list/1013/
├　儒家类
http://www.dushu.com/zhuanti/guoxue/list/1041/
├　兵家类
http://www.dushu.com/zhuanti/guoxue/list/1042/
├　法家类
http://www.dushu.com/zhuanti/guoxue/list/1043/
├　农家类
http://www.dushu.com/zhuanti/guoxue/list/1044/
├　医家类
http://www.dushu.com/zhuanti/guoxue/list/1045/
├　天文算法类
http://www.dushu.com/zhuanti/guoxue/list/1046/
├　术数类
http://www.dushu.com/zhuanti/guoxue/list/1047/
├　释家类
http://www.dushu.com/zhuanti/guoxue/list/1048/
├　道家类
http://www.dushu.com/zhuanti/guoxue/list/1049/
├　艺术类
http://www.dushu.com/zhuanti/guoxue/list/1050/
├　谱录类
http://www.dushu.com/zhuanti/guoxue/list/1051/
├　类书类
http://www.dushu.com/zhuanti/guoxue/list/1052/
├　蒙学类
http://www.dushu.com/zhuanti/guoxue/list/1053/
├　杂家类
http://www.dushu.com/zhuanti/guoxue/list/1054/


集部 http://www.dushu.com/zhuanti/guoxue/list/1014/
├　总集类
http://www.dushu.com/zhuanti/guoxue/list/1063/
├　别集类
http://www.dushu.com/zhuanti/guoxue/list/1064/
├　楚辞类
http://www.dushu.com/zhuanti/guoxue/list/1065/
├　诗文评类
http://www.dushu.com/zhuanti/guoxue/list/1066/
├　词类
http://www.dushu.com/zhuanti/guoxue/list/1067/
├　曲类
http://www.dushu.com/zhuanti/guoxue/list/1068/
├　小说类
http://www.dushu.com/zhuanti/guoxue/list/1069/
　　├　笔记小说
  http://www.dushu.com/zhuanti/guoxue/list/1070/
　　├　传奇小说
  http://www.dushu.com/zhuanti/guoxue/list/1071/
　　├　话本小说
  http://www.dushu.com/zhuanti/guoxue/list/1072/
　　├　章回小说
  http://www.dushu.com/zhuanti/guoxue/list/1073/

自http://www.pkuarch.com/forum/viewthread.php?tid=14978&extra=page%3D1