The invention relates to a converter valve fire extinguishing terminal and a control system thereof. The fire extinguishing terminal comprises a rotating head and a main body part connected with the rotating head. The main body part comprises a fire extinguishing spray head and a control valve used for controlling opening and closing of a fire extinguishing medium pipeline. The main body part further comprises a video collecting unit and an infrared collecting unit. According to the converter valve fire extinguishing terminal, the video collecting unit and the infrared collecting unit are alsodesigned in the fire extinguishing terminal and can perceive the fire scene with the nearest distance as the spray head; fire condition can be accurately monitored the first time, after fire happensat a valve tower of the converter valve, fire extinguishing measures are conducted on fire when fire is in the bud, the fire extinguishing efficiency is greatly improved, and spreading of fire is avoided; and the fire extinguishing input cost is reduced to the greatest extent, the impact of large area surface pollution and the loss of insulation performance caused by fire-extinguishing medium on converter valve equipment is relieved, and the outage time of a direct current system is shortened.