Thermal power plant support hanger suspender swing angle measuring instrument and use method thereof

The invention discloses a thermal power plant support hanger suspender swing angle measuring instrument and a use method thereof. The measuring instrument comprises a measuring instrument support and an angle measuring device. According to the device, a vertical instrument used for determining a datum line in the vertical direction is arranged on a base, a supporting ring is arranged on the vertical instrument, the supporting ring serves as a supporting device of a cylinder to support the cylinder and can drive the cylinder to rotate to a certain degree, one end of the cylinder is an ocular lens for observation, the other end of the cylinder is an objective lens, and an infrared positioning device is arranged below the cylinder and is used for emitting infrared rays. The measuring instrument can be used for short-distance measurement, can also be used for long-distance measurement by avoiding a dangerous area, is flexible in use space, and has the characteristics of high safety, easiness in operation and accu