The utility model relates to a network hardware devices specifically is a load balancing system for mobile office, this system of its characterized in that includes layer 2 switch, data acquisition module, logic analyser, load equalizer, three -tier switch and data center server, wherein: a plurality of data center servers are connected with layer 2 switch, layer 2 switch is connected with load equalizer and reserve load equalizer simultaneously, load equalizer and reserve load equalizer still were connected with logic analyser and three -tier switch through heartbeat line intercommunication,while, and reserve load equalizer is connected with the delay timer, logic analyser is connected with wireless data collection module and delay timer simultaneously, and the delay timer is connected with the memory, and the memory is connected with reserve load equalizer. The message data processing of this system is accurate, timely, can effectively alleviate communication and blocking, adopt reserve load equalizer guarantee network unblocked simultaneously, avoided load equalizer single -point fault.