To provide a mooring sensor positioning method, having superior workability and for highly accurately measuring the depth and the position, and to provide a device therefor.

Installation working is facilitated, by dropping a mooring sensor part 10 and a calibration sensor part 40 from an aircraft or the like on a sea surface 31. The mooring sensor part 10 and the calibration sensor part 40 can sink, by making floats 13 and 43 of the mooring sensor part 10 and the calibration sensor part 40 contract at a previously set time, removal working is not needed by transmitting data acquired with each calibration sensor 41 to an analysis part 50 by wireless or the like. Furthermore, the position and the depth of a mooring sensor 11 of the mooring sensor part 10, corresponding to the position of the calibration sensor 41 swayed and turned with tidal current or the like, can be measured by continuously transmitting data at each constant time and receiving the data.

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