The invention relates to a system via which caller can reject colorful ring, and relative method, wherein said system comprises reject interface module for using intelligent network external device and service exchange point to collect the colorful ring reject request of caller, before the called user holds off or the call is no answer; a ring switch module for switching the present colorful ringinto common ring; a reject collecting module for collecting the colorful ring reject request of caller. When the called attach exchanger receives the call request of caller, the system will play colorful ring and the reject collecting module will collect the colorful ring reject request of user, to report the reject interface module; the reject interface module will transmit the request to the ring switch module; the ring switch module will analyze the request signal and complete ring switch. The invention can reject colorful ring without modifying user colorful ring setting.