There is disclosed a mobile communication data service processing system based on the pseudo-code, which includes a service net gate with data identification module and a service center with the pseudo-code changing module in the mobile communication network. The data identification module is used for identifying the data information and according the identified result sending the pseudo-code request message to the service centre via the service net gate. The pseudo-code changing module is used for conversion computing according to the pseudo-code request message so as to determine the pseudo-code or the user number. There is also disclosed a processing method of the data sent to SP server from the mobile station and to the mobile station from SP server based on the said system, and disclosed a mobile communication data service processing method based on the said system and based on the pseudo-code.