The utility model discloses a flat ground type active defense intelligent alarm fire extinguishing robot. The robot comprises a smoke and fire detector array, a walking vehicle body and an automatic charging device, a vehicle body control device is packaged in the walking vehicle body, the vehicle body control device is in wireless signal connection with smoke and fire detectors and the automaticcharging device, and the walking vehicle body is further provided with a fire extinguishing tank used for containing a fire extinguishing agent, a fire extinguishing pipe, a fire extinguishing switchand a fire extinguishing port adjusting device; the smoke and fire detector detects a smoke and fire signal; the wireless signals are sent to the vehicle body control device; the vehicle body controldevice determines coordinates of an ignition point; the walking vehicle body is controlled to move near the smoke and fire detector of the corresponding coordinate point; by automatically turning on afire extinguishing switch and extinguishing an ignition point under the cooperation of a fire extinguishing port adjusting device, the fire extinguishing device realizes quick positioning of the ignition point at the initial stage of fire, extinguishes the ignition point by spraying a fire extinguishing agent at a short distance, realizes automatic butt joint charging through an automatic charging device, avoids manual charging maintenance, and is more reliable to use.