Surface treatment method and surface treatment device

A surface treatment device comprising:

• a temperature raising unit configured to heat a processing object;
• and
• a treatment unit configured to perform a surface treatment by bringing a processing gas in contact with the processing object heated by the temperature raising unit and solid-solutionizing an element included in the processing gas,
• wherein the temperature raising unit includes a heating chamber in which the processing object is disposed and a first heating unit configured to heat the processing object by heating an atmosphere in the heating chamber in which the processing object is disposed, and
• wherein the treatment unit includes a processing chamber in which the processing object is disposed, a gas supply unit configured to supply the processing gas to the processing chamber, and a second heating unit configured to directly heat the processing object in the processing chamber.