1. A photoelectric sighting device capable of performing 3D positioning and display of a target object, comprising: a field-of-view obtaining unit for acquiring image information within a sighted field of view; a sighting circuit unit, for transferring the image information from the field-of-view obtaining unit to a display unit, and creating an electronic map with both of the photoelectric sighting device and a target object, and transmitting the electronic map to the display unit for dynamic display; a display unit, for displaying the reticle and the image information acquired by the field-of-view obtaining unit and the electronic map; a power supply, for supplying power to the photoelectric sighting device; a range-finding unit, for measuring a distance from the target object to the photoelectric sighting device; a sensor unit, which comprises a three-axis acceleration sensor and a three-axis magnetic field sensor, for determining the direction of the target object in the field of view; and a positioning unit for positioning the photoelectric sighting device.