The invention discloses a business request processing method and system. The method includes the following steps that: when a business request sent by a user is received, a service name corresponding to the business request is obtained, and services corresponding to the business request are searched according to the service name; if the services are found out, a service state machine corresponding to the services is searched in a preset service pool, wherein the service pool is composed of a plurality of service state machines; and when the service state machine corresponding to the services is found, corresponding services in the service state machine are called to execute the business request. According to the method and system of the invention, the service pool comprising a plurality of service state machines is packaged in advance; the services in the service pool are called to execute the business request; and therefore, the concurrent processing capability of ATM equipment can be improved, and the business request processing services of the ATMC are unbound from specific banking business, and problems caused by a condition that the ATMC can only process the business of one bank can be solved.