When one drives the ship near quay, direction and speed of sea waves has been measured with eyes. Therefore the measurement is less-accurate. Thus its improvement has been hoped. So the study proposes a measurement system of direction and speed of sea waves using camera images as part of ship handling support system. This system films the state of sea surface with video cameras, and imports different frame imageries at each unit time (frame). Then this system measures direction and speed of sea waves by calculating correlation coefficient between measurement window of each image after appropriate processing. It is confirmed that this system measures direction and speed of sea waves with high accuracy. Also it is confirmed that this system measures even with camera mounted on the ship affected by the rolling.