Recent trends in the development of robots confirm that the concept of metamorphic – self-regulating structures has found its recent form in theoretical as well as practical robotics. This development direction is topical also for service robotics where the effects of this concept can be used more intensively in the benefit of utility features of service robots. The paper shows theoretical and design approaches to the solution of metamorphic service robots. It gives selected specific questions and problems connected with its design and construction. It submits the studies and designs of service robots solved on the principle of metamorphic – self-regulating structures.