The invention belongs to the field of fire fighting and fire monitoring, relates to an intelligent integrated 
wireless building fire and electrical fire monitoring device and 
system, and particularlyprovides a Zigbee-networking-based 
wireless building fire detecting-alarming device and electrical fire detecting-alarming device, a centralized alarming-monitoring unit point based on Zigbee networking and 4G 
wireless communication, as well as a cloud service platform 
control system scheme based on 
the Internet of Things. The intelligent integrated wireless building fire and electrical fire 
monitoring system comprises three parts, wherein the first part comprises building and electrical fire detecting-alarming nodes positioned at the front end; the second part comprises a centralized alarming-monitoring unit positioned at the middle end; and the third part comprises 
the Internet of Things, a cloud service platform, as well as a management and mobile monitoring terminal which are positioned at the 
tail end. The intelligent integrated wireless building fire and electrical fire monitoring device and 
system provided by the invention have the beneficial effects that through building and electrical fire monitoring nodes, wireless ad-hoc networking can be achieved, and the line investment and the construction cost can be reduced; at the front-end nodes, the onsite environment temperature, the 
smoke concentration, the 
electric bus bar, cable and in-cabinet environment temperature, the 
cable line residual current, and the own 
power supply voltage level of the intelligent integrated wireless building fire and electrical fire monitoring device can be detected; the detected information can be transmitted to the middle-end centralized alarming-monitoring unit in a wireless manner; andmeanwhile, the detected information can be transmitted to the cloud service platform through the 4
G network and then sent to a 
mobile phone and other mobile terminals of management personnel.