The embodiment of the invention discloses a sales slip managing system and method. The sales slip managing system and method are used for providing a safe and convenient sales slip managing and checking platform. According to the sales slip managing system and method, a signature data receiving unit is used for receiving electronic signature information uploaded by a transaction management system, a signature data converting unit verifies the validity of the electronic signature information according to signature secret key information and converts the electronic signature information into signature raw data if the electronic signature information passes validity verification, a signature file managing unit converts the signature raw data into a signed file according to a preset customized format, a remote checking management unit is used for receiving a checking request sent by a checking client side, conducting validity verification on the checking request, and providing the checking information of the signature raw data or the signed file to the checking client side according to the checking request if the checking request passes validity verification.