A valve united sprinkler comprising: an open sprinkler head that is connected to a fire extinguishing solvent storage to sprinkle the solvent; a sprinkler valve that is located between the solvent storage and the sprinkler head to open up the sprinkler head; a sprinkler sensor that is attached to the sprinkler head to detect a fire; and a sprinkler controller that controls only the sprinkler valve and makes the sprinkler valve operate, wherein the sprinkler controller comprises: a plurality of external detector signal input pins that are communicatively connected to a plurality of external detectors that are not part of the sprinkler, in order to receive fire detection signals from the external detectors; a fire alarm signal output pin through which to output a fire alarm signal generated from the fire detection signals to a control panel; a fire extinguishing signal input pin through which to receive a fire extinguishing signal generated by the control panel in response to depression of a fire extinguishing button of the control panel after a fire has been recognized by an operator that presses the fire extinguishing button; and a sprinkler sensor signal input pin through which to receive a sprinkler sensor signal from the sprinkler sensor that is attached to the sprinkler and detects a fire, wherein the sprinker controller activates the sprinkler valve in response to determining that (i) at least one of the fire detection signals generated by the external detectors indicates a fire is detected and (ii) the fire extinguishing signal indicates a fire has been recognized or the sprinkler sensor signal indicates a fire is detected; wherein the sprinkler controller generates the fire alarm signal indicating that a fire is detected in response to determining that (i) at least one of the fire detection signals generated by the external detectors indicates a fire is detected or (ii) the sprinkler sensor signal indicates a fire is detected. an open sprinkler head that is connected to a fire extinguishing solvent storage to sprinkle the solvent; a sprinkler valve that is located between the solvent storage and the sprinkler head to open up the sprinkler head; a sprinkler sensor that is attached to the sprinkler head to detect a fire; and a sprinkler controller that controls only the sprinkler valve and makes the sprinkler valve operate, a plurality of external detector signal input pins that are communicatively connected to a plurality of external detectors that are not part of the sprinkler, in order to receive fire detection signals from the external detectors; a fire alarm signal output pin through which to output a fire alarm signal generated from the fire detection signals to a control panel; a fire extinguishing signal input pin through which to receive a fire extinguishing signal generated by the control panel in response to depression of a fire extinguishing button of the control panel after a fire has been recognized by an operator that presses the fire extinguishing button; and a sprinkler sensor signal input pin through which to receive a sprinkler sensor signal from the sprinkler sensor that is attached to the sprinkler and detects a fire, wherein the sprinker controller activates the sprinkler valve in response to determining that (i) at least one of the fire detection signals generated by the external detectors indicates a fire is detected and (ii) the fire extinguishing signal indicates a fire has been recognized or the sprinkler sensor signal indicates a fire is detected; wherein the sprinkler controller generates the fire alarm signal indicating that a fire is detected in response to determining that (i) at least one of the fire detection signals generated by the external detectors indicates a fire is detected or (ii) the sprinkler sensor signal indicates a fire is detected. (i) at least one of the fire detection signals generated by the external detectors indicates a fire is detected and (ii) the fire extinguishing signal indicates a fire has been recognized or the sprinkler sensor signal indicates a fire is detected; (i) at least one of the fire detection signals generated by the external detectors indicates a fire is detected or (ii) the sprinkler sensor signal indicates a fire is detected.