Because of the huge difference of optical characteristic between underwater target and Scchi-Disk, it was unscientific and inaccurate to estimate the optical concealment depth (OCD) of underwater target using Scchi-Disk depth (SD). A method to determine the optical concealment depth of underwater target by satellite remote sensing of ocean color is proposed. The influence of underwater target on light transmission in the water was analyzed on the foundation of the concept of underwater target optical concealment depth, and the semi-analysis transform model of the Scchi-Disk depth and underwater target optical concealment depth was obtained based on the transfer equation of contrast. Then the model of retrieving the optical concealment depth of underwater target by remote sensing of ocean color was setup. Finally, an in-situ experiment was implemented, and the results of experiment showed that the black model error of theoretical and experimental data was less than 30%, while for the white mode the error was less than 20%.