The invention discloses a self-service infrared eccentric photography optometry instrument and a self-service optometry method. The optometry instrument includes: an illumination light source, an aperture, a filter, an imaging element, a dichroic mirror, an integrated controller, and a camera that can move along the optical axis. Imaging lens; the integrated controller is connected with an external central processing device; when the refractometer is in the preview state, the integrated controller controls the imaging lens to move along the optical axis, and receives the position feedback signal of the imaging lens until the human eye is in the working position; Then, the integrated controller controls the lighting source and the imaging element to flash and take pictures synchronously, completes the image collection of human eyes, and finally completes the self-service optometry; in the whole process, the central processing device realizes the entire process of self-service optometry by controlling the integrated controller; The whole process does not require the cooperation of others, and the tester can achieve the purpose of self-refraction by using the infrared eccentric camera. Therefore, the refractometer and the method save manpower and material costs.