The present invention provides a mutual rating system in which objects, such as users, content, and terminal devices, on the network can be rated and ratings for the objects can be checked without using a server. In the rating system, objects (users, content, terminal devices, etc.) associated with a network (3) are rated. The mutual rating system is connected to the network (3), and includes: a plurality of third party terminals (1(#3)) having stored therein rating information related to objects previously rated by the user; and content demanding terminal devices (1(#1)) for collecting rating information related to desired objects from all online rating information stoning terminal devices. Each content demanding terminal device (I(# I )) analyzes rating information collected from the third party terminal devices (1(#3)) to obtain a rating for a desired object.