A multi-stage desalination apparatus, comprising: a plurality of evaporator stages arranged in series, the evaporator stages respectively including heat exchange tubes disposed in interior heat exchange spaces, the plurality of evaporator stages being configured to pass steam with a high temperature inside the heat exchange tubes and to feed feed water to an external surface of the heat exchange tubes to generate the steam and concentrate water from the feed water through a heat exchange between the steam and feed water; and a feed water pipe arrangement configured to feed the feed water to each of or to multiple of the evaporator stages in parallel, wherein the feed water pipe arrangement includes a first feed water pipe and a second feed water pipe, wherein the first feed water pipe is configured to feed water to evaporator stages of a low temperature part and the second feed water pipe is configured to feed water to evaporator stages of a high temperature part, wherein the multi-stage desalination apparatus is configured to feed the steam with high temperature to an evaporator stage arranged most upstream among the evaporator stages, and to feed the steam generated from the feed water through the heat exchange to an adjacent evaporator stage to provide a continuous heat exchange to an evaporator stage arranged most downstream among the evaporator stages, wherein the feed water pipe arrangement includes additive-dosing parts configured to dose an additive to inhibit the generation of scale in the feed water, and at least one pre-heater configured to heat the feed water to be entered, wherein the additive-dosing parts include at least one first dosing part configured to dose a polymer-based anti-scalant and at least one second dosing part configured to dose acid, wherein the first dosing part is provided on the first feed water pipe and the second feed water pipe, wherein the second dosing part is provided only on the second feed water pipe, and wherein the at least one pre-heater is provided only on the first feed water pipe. a plurality of evaporator stages arranged in series, the evaporator stages respectively including heat exchange tubes disposed in interior heat exchange spaces, the plurality of evaporator stages being configured to pass steam with a high temperature inside the heat exchange tubes and to feed feed water to an external surface of the heat exchange tubes to generate the steam and concentrate water from the feed water through a heat exchange between the steam and feed water; and a feed water pipe arrangement configured to feed the feed water to each of or to multiple of the evaporator stages in parallel, wherein the feed water pipe arrangement includes a first feed water pipe and a second feed water pipe, wherein the first feed water pipe is configured to feed water to evaporator stages of a low temperature part and the second feed water pipe is configured to feed water to evaporator stages of a high temperature part, wherein the multi-stage desalination apparatus is configured to feed the steam with high temperature to an evaporator stage arranged most upstream among the evaporator stages, and to feed the steam generated from the feed water through the heat exchange to an adjacent evaporator stage to provide a continuous heat exchange to an evaporator stage arranged most downstream among the evaporator stages, wherein the feed water pipe arrangement includes additive-dosing parts configured to dose an additive to inhibit the generation of scale in the feed water, and at least one pre-heater configured to heat the feed water to be entered, wherein the additive-dosing parts include at least one first dosing part configured to dose a polymer-based anti-scalant and at least one second dosing part configured to dose acid, wherein the first dosing part is provided on the first feed water pipe and the second feed water pipe, wherein the second dosing part is provided only on the second feed water pipe, and wherein the at least one pre-heater is provided only on the first feed water pipe.