The invention discloses a crawler type security robot. The crawler type security robot has the advantages that under the coordination and cooperation functions of a crawler walking device, an execution mechanical arm, an information collecting device, a fire extinguishing device, and a self protection system, the crawler type security robot can enter the fire site to survey, collect the information, and automatically find fire, and the direction of a water spray head is adjusted by the mechanical arm to extinguish fire; by arranging a water cooling system to protect an electronic circuit part,a crawler chassis can climb over various obstacles, and a mechanical jaw for destroying and detachment is used for opening and closing a valve at site, or handling the obstacles, and the like; the information collecting device is used for detecting the concentration of harmful gas at site, collecting the site image, and the like, and sending the collected information to a remote control center via a wireless receiving and sending module, so that a firefighter can perform comprehensive analysis and surveying on the accident site, make a reasonable and effective rescue plan, and take actions, thereby minimizing the loss of life and property of people, and reducing the threaten to the life of the firefighter.