An apparatus for measuring the temperature field distribution inside a crucible is provided. An apparatus for measuring the temperature field distribution inside a crucible, comprising: a crucible including an upper lid, a main body, a growth chamber, and a material filling portion; a heat insulating material provided outside the crucible; A plurality of movable heating elements for heating, and a plurality of thermoelectric elements provided inside the upper lid through the plurality of holes on the upper lid and covered with a heat-resistant insulation covering material for measuring the temperature field distribution inside the crucible Including a pair. By using a plurality of thermocouples covered with the heat-resistant insulating coating material via this, it is possible to realize an optimal temperature distribution of crystal growth by effectively measuring and adjusting the temperature distribution inside the crucible. [Selected figure] Figure 1
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