Method, system and server for managing data transmission. The method comprises the following steps: the first client requests the server for data update; the server analyzes the request of the first client and takes the control measurement to the data that the client requests to update according to the predetermined control policy, and performs the subsequent process after the data requested by the client meet the control policy; the server informs the first client to update the data; the first client updates the data; the server informs the second client that the data of the first client has been updated; the second client acquires the updated data. The present invention discloses also a control system and a control equipment achieving the above method. The server takes the unified central control notification mode according to the present invention to effectively control the propagation approach of the personalized data.