High-efficiency salt water desalination system and method capable of fully separating salt water into salt and fresh water for use

A high-efficiency salt water desalination system and method are provided. The high-efficiency salt water desalination system includes a water quality treatment device configured to generate magnetized salt water; a salt water preheating device configured to heat the magnetized salt water to a medium temperature; a salt water atomizing device configured to atomize the magnetized salt water into a mixed mist; a mixed mist preheating device configured to heat the mixed mist to a medium temperature; a mixed mist heating device configured to heat the mixed mist to a relatively high temperature; and a hot mixed mist heat recovery system configured to absorb the heat of the hot salt water mist heated by the mixed mist heating device through a first hot mixed mist condensing device and sends it back to the mixed mist preheating device to heat the mixed mist, and also configured to condense the hot mixed mist, extract the first freshwater from the hot mixed mist and discharge a first residual mist. The second hot mixe