To provide a portable electronic seal system which enables seal-less and slip-less dealings.

Provided is a means 3 of enabling a terminal 14 of a financial institution 1 etc., and a mobile terminal 2 of a user to transmit and receive data. The mobile terminal 2 is provided with a means of receiving, registering, and storing seal impression data, a means 21 of displaying an input screen with template information needed for the dealings, a means 22 of generating dealing input information by an input operation, and a means of sending the dealing input information and seal impression data to the dealing terminal 14 which is provided with a means 12 of transmitting seal impression data of the user and template information necessary for dealings to the mobile terminal 2 to register them, and a means of generating information for processing by communication with a host 11 of the financial institution from the seal impression data received from the mobile terminal 2.