The invention discloses a smart access control system based on city Internet of Things and a security system. The smart access control system comprises a cloud server, an agency server, a motor vehicle access control system, a non-motor vehicle and person access control system, a cell gate access control system, a building anti-climbing system, a three-dimensional real scene map and a GIS (geological information system), wherein the motor vehicle access control system, the non-motor vehicle and person access control system, the cell gate access control system and the building anti-climbing system are respectively connected with the cloud server; the cell gate access control system comprises an IC (integrated circuit) card access control system, a video telephone access control system, a human face recognition access control system, a mobile phone MAC (media access control) address access control system and a palm vein access control system. The smart access control system and the security system have the advantages that the communities in the city Internet of Things are displayed in the three-dimensional real scene map, then the authority management is performed on persons, motor vehicles and non-motor vehicles in the communities, and the entry and exiting at the entrance and cell gates of the communities can be monitored, so as to improve the intelligence management of the community, and facilitate the public security system to supervise and manage.