The invention discloses a communication route resource configuration system and method, and the system comprises a route calculation triggering module which is used for judging whether a route triggering condition is met or not, and generating a service route calculation application when the route triggering condition is met; a business demand analysis module which is used for determining a routing calculation requirement according to business characteristics and determining a routing calculation precondition when receiving the business routing calculation application; a route calculation module which is used for determining a service route resource allocation result under the constraint of a service route calculation precondition according to the current service route configuration information and the route calculation requirement; And a routing configuration module which is used for configuring the service routing resources according to the service routing resource distribution result, and can also comprise a reliability analysis module for carrying out reliability analysis on the service routing resource distribution result. According to the invention, the reliability and robustness of the network can be considered while the service transmission requirement is met.