The invention discloses an agent load balancing method based on a mobile agent system. The mobile agent system has a three-layer network structure which comprises a total controller accessed to a backbone core network, a branch controller accessed to a region center and a node server accessed to a branch network. The agent load balancing method based on the mobile agent system comprises the following steps: a, the node server and the branch controller send agent server information to the total controller at an interval set time, and a corresponding mobile agent server information base is built; b, a mobile terminal sends an agent request containing the mobile terminal position information to the total controller; c, the total controller calls the agent server information in the mobile agent server information base according to the agent request, and a set algorithm is adopted to acquire a global optimal mobile agent server; and d, the total controller returns the information of the global optimal mobile agent server to the mobile terminal.