The invention discloses a controlling method of resource acceptance, which releases network resource according to the conversation priority from low to high until the released network resource satisfies the need of request business of user when the network resource is affirmed to be released due to request business of user. The invention also provides a resource receiving control system, which consists of business deciding function SPDF and switch-in net resource receiving control function A-RACF. The invention relates to a business applying system AF, which supplies priority of media flow in the conversation for RACA with high resource utility of network.