TM data are major remote sensing data at present and can perfectly meet the needs of identifying active fractures. The remote sensing technology and the high-precision TM image were applied in Chuanshan peninsula, eastern Zhejiang province. Rapid and accurate identification of active fractures was achieved. 23 fractures and 7 active fractures were recognized. The study shows that the remote sensing technology can overcome such shortcomings of the traditional surveying methods as long periodicity, high cost and impossibility of making in site investigation at many places.