The invention discloses a 
public security combat 
command system capable of realizing indoor three-dimensional positioning and 
vital sign monitoring. The invention collects three-dimensional position and 
heart rate information of a warrior through a positioner and a 
heart rate wristband in real time, the real-time collected information is transmitted to a walkie-talkie through the 
wireless communication technology, the walkie-talkie transmits the real-
time data to a vehicle-mounted platform of an on-site 
command center through a 
public security network, after receiving the data, the vehicle-mounted platform can transmit the data to a command 
machine in real time by a 
wireless or wired mode, the command 
machine analyzes the data in real time to display the three-dimensional position of the warrior and the 
heart rate state information of the warrior. The command 
machine can transmit the 
battlefield information to a remote 
command center through a mobile 
public network in real time to provide data support for the remote command decision-making and remote deployment support. At the same time, the 
system can also realize the two-way 
voice communication between the warrior and the commandcenter through the 
public security network. The invention can realize scientific warfare and scientific command, increase rescue efficiency of warriors and reduce casualties.