Client communication system, load balancing method and vehicle renting method

The invention discloses a client communication system, load balancing method and vehicle renting method. The communication system includes a client and a network management platform, wherein the client includes a mobile phone APP, a vehicle-mounted APP and a WEB user platform; the mobile phone APP and the vehicle-mounted APP are connected with a member authentication service, a heartbeat and message pushing service and an APP service group of the network management platform through an HTTP request, the WEB user platform is connected with the member authentication service and the APP service group through the HTTP request, the member authentication service, the heartbeat and message pushing service and the APP service group are connected with a member login state database, and a message queue is connected with the APP service group, a fee deduction service and a short message service. The communication system decouples an application terminal with a control terminal, thereby effectively solving the problem of the occurrence of the probability that an abnormality of the application terminal causes an abnormality of the control terminal; and a client does not process any service logic, thereby enabling the application terminal to be lightweight. The scheme is suitable for all electric automobile leasing systems.