Method and system for evaluating multisystem wireless signal common coverage

The invention discloses a method and system for evaluating multisystem wireless signal common coverage. The method comprises: acquiring a conversation record of a mobile subscriber in a multi-wireless communication system, and extracting a key field; according to the key field, generating records of intersystem association wireless device pairs for storing into an initial association database; counting the appearance frequency of each intersystem association wireless device pair in the database, and extracting intersystem association wireless device pairs with frequencies greater than a first threshold; counting the appearance frequencies of the extracted intersystem association wireless device pairs in both directions, and determining that the association wireless device pairs whose differences of appearance frequencies in the both directions are smaller than a second threshold have a common coverage relation; and according to the common coverage relation of the association wireless device pairs, obtaining the common coverage relation of the multi-wireless communication system through analysis. By adopting the method and system provided by the invention, the accuracy in evaluating the multisystem wireless signal common coverage can be improved.