The utility model relates to a deep sea gas hydrate detection technology especially relates to deep sea gas hydrate and surveys sampling method and device. A formula deep sea gas hydrate that walks to navigate surveys sampling device, includes acoustics fathometer, work mother ship, a type frame, deep sea winch, the gravity sampler of computer, two sets of different frequencies, the computer is placed in the laboratory on work mother ship, a type frame is installed in work mother ship's the fantail deck outside, the deep sea winch is located work mother ship's fantail deck inboard, realizes with the cooperation of A type frame that the input of gravity sampler is operated with retrieving, the gravity sampler is connected with the deep sea winch, is formed by stainless steel pipe welding, has placed the sampling pipe in the steel pipe of lower part. The beneficial effects of the utility model are that: sampling device simple structure, the processing ease. Do not rely on complicated detecting instrument, and the boat formula of walking that adopts general investigation instrument and sampling equipment just can realize deep sea gas hydrate is surveyed and the sample, test range is big, detection rapidity and accuracy height.