Laser distance measurement is widely used in scientific research and industrial application. Non-contact and high precision distance measurement can be realized by measuring the time, phase, frequency, polarization and intensity of laser. Single-photon detection improves the sensitivity of photoelectric direct detection to the limit of single photon, greatly improves the ability of the laser distance measurement, so we can see farther. We have achieved long-distance and high-precision laser three-dimensional imaging through developing high-speed, multi-channel, and high-precision single photon detectors.