The utility model discloses a wireless magnetic internal channel positioning, on-line observing and image collecting device, comprising three parts, a casing part, a receiving and monitoring part and a magnetic control means. The casing part contains casing, and lens are arranged in the casing and fixed on the fixing plate with LEDarray. A lens, a CMOSimaging sensor and a control circuit are connected in turn and are composed of a pick-up head. The pick-up head, the LEDarray and the wireless transmitting circuit are in shunt connection and then are connected with the magnetic switch and the power supply. The wireless transmitting circuit is connected with the aerials. The receiving monitoring part comprises a wireless receiving system and a monitor. The wireless receiving system is used to receive the signal transmitted by the wireless transmitting circuit, and the wireless receiving system is connected with the monitor through data wires. The magnetic control means is used to control the on-off of the magnetic switch. Using the magnetic control means, the utility model can realize fixed point check, and it is simple and practical, the cost is low, so it is suited to use in the medical treatment and industrial circle.