The utility model relates to an intelligent transformer oil level detection system based on a pressure sensing system. The device comprises a pressure signal acquisition device, a controller and an oil guide pipeline connected with an oil conservator, wherein the pressure signal acquisition device is respectively connected with the oil guide pipeline and the controller, the system further comprises a laser range finder, a lifting seat used for adjusting the height of the laser range finder and a holder used for adjusting the angle of the laser range finder, the holder is installed on the lifting seat, and the laser range finder is installed on the holder. Compared with the prior art, the laser range finder is additionally arranged, the holder and the lifting base are combined, the height difference between the pressure sensor and the bottom of the oil conservator can be achieved, and therefore the accuracy of oil liquid level measurement is improved.