A die coater inspection device for inspecting a die coater comprising a first die, a second die, and a shim formed between the first die and the second die, the die coater inspection device comprising: a sensor module adapted for moving in a thickness direction of the die coater, that is, in a direction from the first die to the second die, and configured to inspect a lip or the shim of the die coater; a control part configured to control an operation of the sensor module; and a storage part in which reference data (I1 to I5) on the thickness of the lip or the shim is stored, wherein the sensor module comprises a distance detection sensor configured to measure a height of the lip or the shim, characterized in that: the sensor module further comprises a position detection sensor configured to detect a position of an edge of the lip by changing a transmitted signal from a first signal to a second signal, and the control part comprises: a first encoder configured to recognize a coordinate value of the sensor module whenever the sensor module moves in the thickness direction of the die coater, wherein, when the first signal is changed to the second signal, the first encoder recognizes the coordinate value of the sensor module as a coordinate value of the edge; a reception part configured to receive the signal transmitted by the position detection sensor; a determination part configured to determine the position of the edge of the lip according to the signal received by the reception part; and a calculation part configured to perform calculation based on the reference data (I1 to I5) on the thickness of the lip or the shim and the coordinate value of the edge so as to derive a coordinate value of the lip or a coordinate value of the shim. a sensor module adapted for moving in a thickness direction of the die coater, that is, in a direction from the first die to the second die, and configured to inspect a lip or the shim of the die coater; a control part configured to control an operation of the sensor module; and a storage part in which reference data (I1 to I5) on the thickness of the lip or the shim is stored, wherein the sensor module comprises a distance detection sensor configured to measure a height of the lip or the shim, characterized in that: the sensor module further comprises a position detection sensor configured to detect a position of an edge of the lip by changing a transmitted signal from a first signal to a second signal, and the control part comprises: a first encoder configured to recognize a coordinate value of the sensor module whenever the sensor module moves in the thickness direction of the die coater, wherein, when the first signal is changed to the second signal, the first encoder recognizes the coordinate value of the sensor module as a coordinate value of the edge; a reception part configured to receive the signal transmitted by the position detection sensor; a determination part configured to determine the position of the edge of the lip according to the signal received by the reception part; and a calculation part configured to perform calculation based on the reference data (I1 to I5) on the thickness of the lip or the shim and the coordinate value of the edge so as to derive a coordinate value of the lip or a coordinate value of the shim. the sensor module further comprises a position detection sensor configured to detect a position of an edge of the lip by changing a transmitted signal from a first signal to a second signal, and the control part comprises: a first encoder configured to recognize a coordinate value of the sensor module whenever the sensor module moves in the thickness direction of the die coater, wherein, when the first signal is changed to the second signal, the first encoder recognizes the coordinate value of the sensor module as a coordinate value of the edge; a reception part configured to receive the signal transmitted by the position detection sensor; a determination part configured to determine the position of the edge of the lip according to the signal received by the reception part; and a calculation part configured to perform calculation based on the reference data (I1 to I5) on the thickness of the lip or the shim and the coordinate value of the edge so as to derive a coordinate value of the lip or a coordinate value of the shim. a first encoder configured to recognize a coordinate value of the sensor module whenever the sensor module moves in the thickness direction of the die coater, wherein, when the first signal is changed to the second signal, the first encoder recognizes the coordinate value of the sensor module as a coordinate value of the edge; a reception part configured to receive the signal transmitted by the position detection sensor; a determination part configured to determine the position of the edge of the lip according to the signal received by the reception part; and a calculation part configured to perform calculation based on the reference data (I1 to I5) on the thickness of the lip or the shim and the coordinate value of the edge so as to derive a coordinate value of the lip or a coordinate value of the shim.