Data processing method and system and second server

The embodiment of the invention provides a data processing method and system and a second server, in the data processing system provided by the invention, a first server does not calculate index data corresponding to each user identity identifier, but extracts at least one piece of field information representing a user behavior from each user historical behavior data; the first field sets corresponding to the user historical behavior data with the same user identity identifier belong to the same first user behavior set; the at least one first user behavior set is stored in the database, that is, index data is not stored for the database, so that the storage space of the database is saved; the second server can receive the first request which is sent by the third server and represents to obtain the target index data, the target index data is obtained through calculation and then sent to the third server, the target index data is not stored, and the storage space of the second server is saved. 本申请实施例提供了数据处理方法、系