Abstract: Oil-gas migration is regarded as the weakest link in petroleum geology research in the world and is the most frontier science as well, and is the core of the dynamic research of oil-gas accumulation and migration. Although fault is the important pathway for oilgas migration in the faulted-depression basin, the contact plane of the hydrocarbon source rock is small, which cannot absorb a mass of oil and gas. However,in the downthrow block of the major fault, the subsea fan sandbody has large contact plane with the hydrocarbon source rock, which could absorb the most of oil and gas produced in the hydrocarbon rock. While reaching the certain saturation of oil and gas, the temperature and pressure will rise and along with the episodic movement of the fault, oil and gas will migrate upwards in the transfer station of the sandbody along the fault, accumulate, and the reservoir will then be formed. Both the success and the failure practice in exploration proved that the way of model"Oil-gas Transfer Station "of the fault-sandbody is correct, furthermore, it will guide the research and exploration for the oil-gas migration in the future.