A three-dimensional image system includes an image generating apparatus that generates an image signal of a three-dimensional image for performing a three-dimensional observation, a monitor that displays, as an image for three-dimensional observation, the image signal generated by the image generating apparatus, glasses for three-dimensional observation for observing, as a three-dimensional image, the image for three-dimensional observation displayed on a display section of the monitor, a storing section that is provided in the glasses for three-dimensional observation and stores a depth information correction value for correcting depth information for giving a cubic effect of the image for three-dimensional observation displayed on the display section, a scanning section that is provided in the monitor and scans the glasses for three-dimensional observation in order to read information stored in the storing section, and a control section that performs control to set, according to a scanning result of the scanning section, in the monitor, the depth information correction value.
