Abstract: Disclosed are a smart mask which performs various sensing of a breathing characteristic, etc. and a smart mask-based service system which implements a service through a communication network by using a smart mask. The smart mask includes a differential pressure unit configured to provide a differential pressure signal corresponding to a difference between an atmospheric pressure and an internal pressure; a characteristic extraction unit configured to extract breathing characteristic information, representing a breathing characteristic, from the differential pressure signal; an electric fan configured to be driven for intake; a communication module configured to perform communication with an outside; and a control unit configured to drive the electric fan and transmit the breathing characteristic information to the outside through the communication module.