The invention discloses a mobile office system, comprising a mobile communication system, a service system and a wireless application service system, wherein the mobile communication system, the service system and the wireless application service system are provided by a mobile operator; the service system comprises a wireless application universal interface module and more than one heterogeneousinformation platform; and the wireless application service system comprises an enterprise wireless gateway, a universal control module, a wireless application integrated module and a wireless universal interface analysis module. The invention also discloses an implementation method of mobile officing. According to the invention, the wireless application service system is arranged between the mobile communication system provided by the mobile operator and multiple types of heterogeneous information platforms in an enterprises network, thus providing uniform interface standards and functional supports for the multiple types of heterogeneous information platforms, and carrying out data exchange with the mobile communication system, thereby implementing sharing and loose coupling integration of a large number of heterogeneous information systems in an enterprise for short messages, multimedia messages, Push, wireless application protocols (WAP) and other wireless service means.