The present invention discloses a method, an apparatus and a system for service association based on service nesting charging. Wherein the method for service association based on the service nesting charging includes: obtaining a request message sent from a service platform, wherein the request message carries key service information; searching in stored service record information for the service record information which matches the key service information, wherein if matched service record information exists, then a charging identifier in the matched service record information is obtained, and if no matched service record information exists, then a charging identifier is allocated, said charging identifier being used for performing an association charging on multiple services which have the same charging identifier by a charging platform; sending the charging identifier and the information carried in the request message to a receiving end of the request message.