The invention discloses a conference sign-in device based on face identification and an application method. The device is composed of a hardware system, a software system and a network system, whereinthe hardware includes a host, sound equipment, a display, a camera, a two-dimensional code, a Wifi module and a power source, the host is connected with the sound equipment, the display, the camera and the network system, the software system includes a check-in module, a management module, an analysis module, a local database and a cloud database, and the network system consists of the wired network and the wireless network. Participants can collect the face information for identification by simply passing by the device on admission, the identity information is displayed through voice and a display screen, no contact with the equipment is required throughout the process, the high-definition camera is adopted to identify human faces, the faces can be identified without stopping, the speedand efficiency of the sign-in are improved, strong practical performance is realized, and the conference sign-in device can be operated under offline and online network modes and is convenient to be promoted and used in various conference sites.