NOVELTY - The complex has a propulsion engine mounted on a supporting unit to enable robotic complex movement in a fixed location. A submerged propulsion unit is provided in a dynamic positioning system attached to robotic complex structures, a free floatation navigation system, a forced complex floatability variation system, a motion control system for the complex and individual modules that interface with a complex navigation system, a cable rope for communication with external systems for safety purposes, an external power supply, a compressed air supply and sea-or shore-based control systems.    USE - Substatic structure multi-purpose remote-controlled amphibious robotic complex for facilitating surface inspection and maintenance of inlet parts of large diameter cone-shaped water conduits and a set of structures withdrawing water from rivers, water reservoirs or water bodies, transporting the water to a station unit of a hydroelectric power plant and a pump station and withdrawing the water from underground structures.    ADVANTAGE - The complex allows inspection and technical monitoring of inlet parts of conduits of waterworks inspected in a water-free state in view of design features and conditions of operation, so that the complex of a modular structure can be embodied to enable rapid assembly/disassembly inside the conduit. The complex allows an additional ballasting system to be installed and forcedly filled with liquid or gas to control center floatability and orient a side of a positioning and motion module, so that the ballasting system can be provided above an entire center structure by gravity, thus deploying a center in minimal time by using only navigation and dynamic positioning systems. The complex installs additional supporting sections with actuating units displaced circumferentially against actuating units already installed on a supporting unit and positions the sections on a supporting periphery, which ultimately forms a more stable structure to be located at a conduit bottom and a controllable installation in a water-free conduit due to initial variation in geometric shape of the actuating units supported by conduit inlet part walls with wheeled or track-mounted propulsion units, thus particularly ensuring smooth displacement of the complex toward the conduit center in course of installation.