The invention discloses a marine liquid level remote measurement and valve remote control system experimental device and a control method thereof. The experiment device comprises a water inlet pump, aliquid level sensor, a left transverse cabin, a water pipe, an electromagnetic valve, ballast tanks, a right transverse cabin, a water outlet pump, a simulation pool and a ballast cabin, wherein thenumber of the ballast tanks is 12, the ballast tanks are divided into No.1 to No.12 ballast tanks, the ballast tanks are symmetrically distributed on the two sides on the whole, the first ballast tankand the second ballast tank are device heeling adjusting main tanks, the length of each of the first and second ballast tanks is designed to be 600 mm, the width of each of the first and second ballast tanks is designed to be 450 mm, the third ballast tank and the fourth ballast tank are device heeling adjusting main tanks, the length of each of the third and fourth ballast tanks is 600 mm, the width of each of the third and fourth ballast tanks is 300 mm, the rest eight ballast tanks are fine adjustment tanks, equal-area design is adopted, and the main tank area is larger than each fine adjustment tank. The invention provides an experimental device capable of simulating an actual ship ballast tank and a valve control method, the external allocation of ballast water is realized, and the balance adjustment time is reduced.