The invention discloses a laboratory safety monitoring and early warning system. A plurality of flame sensors are used for detecting fire sources of a laboratory, spray heads are arranged around eachflame sensor respectively, the detection area of each flame sensor is the same as the water spraying area of the corresponding spray head around each flame sensor, when a certain flame sensor detectsthat a fire source exists in the laboratory, a controller opens the spray heads around the flame sensor to spray water, and the spray heads around the flame sensor can accurately spray water to the fire source detected by the flame sensor, fire safety accidents can be timely and effectively automatically responded, the accuracy of fire monitoring and early warning of the system is improved, meanwhile, the temperature and humidity in the laboratory are detected by using a temperature and humidity sensor, the laboratory is ventilated and exhausted through a remote control module device and an exhaust module, and a favorable environment can be achieved in the laboratory before operation staff enter the laboratory.