Business server side load balancing method, client side, server side and system

The embodiment of the invention discloses a business server side load balancing method, a client side, a server side and a system. The business server side load balancing method comprises the steps that the business client side obtains business identification corresponding to a business request currently submitted by a user, obtains at least one physical address, corresponding to the business identification, of a business server in a distributed cluster server, determines the target physical address in the physical address of the business server according to the preset load balancing algorithm and establishes communication connection with the business server corresponding to the target physical address. According to the business server side load balancing method, the client side, the server side and the system, distributed load dispatching based on business can be achieved through the business server side, so that the resource utilization rate is increased, the dispatching risk is reduced, and the cost is low.