Smart city monitoring device based on Internet of Things

The utility model discloses a smart city monitoring device based on the Internet of Things, comprising a monitoring vertical rod, the upper end of the right side of the outer surface of the monitoringvertical rod is fixedly connected with a cross rod, the middle end of the top of the cross rod is fixedly provided with a wireless transmitter, and the right end of the bottom of the cross rod is fixedly connected with an operation box. After a worker opens the sealing plate through a key, the PLC is controlled to control the rotating motor to rotate, the rotating motor rotates to drive the rotating shaft to rotate, the steel wire rope is continuously extended downwards while the rotating shaft rotates, and the steel wire rope is continuously extended downwards to enable the conical connecting block to be separated from the inner surface of the mounting seat. When the monitoring camera is maintained, the conical connecting block moves downwards, the conical connecting block moves to drivethe fixing table and the