Fecha de publicación: 05/11/2019 Fuente: Wipo "IOT" The utility model provides a monitoring device based on NB-IOT, an engineering machinery device and a monitoring system, and relates to the field of engineering machinery. The monitoring equipment based on NB-IOT comprises an NB-IOT communication module, a control module and a sensing device. And the control module is respectively connected with the NB-IOT communication module and the sensing device. The NB-IOT communication module is in interactive communication with the control module, the NB-IOT module is low in energy consumption, and data can be uploaded and downloaded continuously. The engineering machinery device is provided with the NB-IOT-based monitoring equipment, so that the utilization rate of engineering machinery can be improved, and the maintenance cost can be reduced. Theengineering machinery client monitoring system is convenient for data transmission at a client by adopting NB-IOT technology, and is low in energy consumption and strong in signal. According to the engineering machinery monitoring system, the whole monitoring system and engineering machinery are integrated to form a complete information chain and an execution end, and efficient utilization and maintenance of the engineering machinery are achieved.