NOVELTY - The device (10) has a buoy main body (1) whose center part is arranged with a flange pipe (2), a controller, a radio communications unit and a GPS. A PVC sphere part is passed to a central part of a polyurethane foam. A flange cover (2a) is arranged in upper side and lower side flange parts of the flange pipe. A pendency frame (14) is fixed in a lower side of the flange cover of the flange pipe. A cable splicer is provided with a cable line (8) that is extended from a battery casing (12). A light unit (4) is mounted on an upper side of the flange cover of the flange pipe by a mount part (6).    USE - Mooring-type ocean circumstances observation buoy device.    ADVANTAGE - The device is simple in structure. The device avoids constructing of a concrete block with a concrete anchor so as to reduce weight of the device and environmental contamination by toxicity of cement component. The device reduces thickness of a wire rope and prevents the cable line from being entangled with a pendency rope. The device extends the pendency rope from the mooring area zone to the cable line so as to easily hang a sensor instrument corresponding to depth of water stratification demanding, so that safety of the device can be improved. The device installs an atmosphere pressure sensor at an upper side of the buoy main body and a water pressure sensor according to the pendency rope so as to systematically collect environment data with dissolved oxygen and density of salt, so that position control or change operation of the sensor instrument can be easily performed, thus ultimately improving reliability of collected environment data and measurement in the device. The device arranges an observation control device and a communication device in an inside of the flange pipe so as to improve protection and easy maintenance and repair process of the device. The device utilizes a prefabricated type shock-absorbing reinforcing support to reduce risk of breaking of the buoy main body.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a mooring-type ocean circumstances observation buoy device.    Buoy main body (1)    Flange pipe (2)    Flange cover (2a)    Light unit (4)    Mount part (6)    Cable line (8)    Mooring-type ocean circumstances observation buoy device (10)    Battery casing (12)    Pendency frame (14)