Provided is an endoscope system including an endoscope which includes an illumination optical system having a fluorescent substance and an imaging optical system having an imaging element; and a control device which is connected to the endoscope. The control device includes a light source unit having a semiconductor light emitting element generating excitation light used to excite the fluorescent substance, a storage section storing predetermined color correction information, and an image processing section creating captured image data by performing a calculation process on an image signal output from the imaging element on the basis of the color correction information. At least one of optical characteristics of the fluorescent substance and the semiconductor light emitting element is detected, and the color correction information stored in the storage section is corrected on the basis of the detected optical characteristic.