The embodiment of the application discloses a unit system service processing method and device and a service processing system. The method comprises the following steps: receiving a service request, wherein the service request includes user information; determining a routing rule corresponding to a service type of the service request according to the service type; and determining a service unit for processing the service request according to the user information and the routing rule, and sending the service request to the determined service unit in order to process the service request. Through the embodiment of the application, different services are processed by different service units, and information corresponding to different services in the user information are correspondingly allocated to corresponding service units, so that response time is not influenced, and unit deployment of the user information can be realized, thereby enhancing the availability and disaster tolerance ability of a system in which the user information exists.