Abstract: A mechanical vapor recompression system and method thereof. The system comprises: an evaporator (20), a first cavity (30), a first fluid collection area (31), a second cavity (32) and a blowing type pump (33), the evaporator (20) having a high temperature fluid reception channel (21a) and a low temperature fluid reception channel (21b); the method comprises: enabling a first fluid to flow from a vapor source (10) to the high temperature fluid reception channel (21a) of the evaporator (20), enabling liquid water collected from a first fluid supply to flow to the low temperature reception channel (21b), and transferring heat of vaporous water in the high temperature reception channel (21a) to the liquid water collected in the low temperature reception channel (21b); converting at least a part of the liquid water collected in the low temperature reception channel (21b) to vaporous water, and returning the further heated vaporous water to the vapor source (10).