As a strategic resource, energy is the basic lifeline of the national economy and also an important material resource for the comprehensive development of society. Energy conservation and consumption reduction have important practical significance for solving the current energy crisis in China.
       For electric hoist enterprises, reducing energy consumption is also an inevitable requirement for enhancing enterprise competitiveness and improving efficiency. With the implementation of the Energy Conservation Law of the People's Republic of China and the commitment made by China at the Copenhagen Conference to reduce the carbon dioxide emissions per unit of GDP by 40% to 45% by 2020 compared with 2005, energy conservation has become the focus of social attention. Energy conservation and emission reduction have also been included in the work performance assessment objectives of governments at all levels, and corresponding energy conservation indicators have been developed in all fields, and laws and regulations, standard systems and regulatory assessment on energy conservation have also been gradually established and improved.
        The energy consumption of electric hoist is huge, so it is necessary to strengthen the energy efficiency supervision and energy conservation guidance of electric hoist industry. Studying the energy efficiency test method of electric hoist will provide an effective and reliable basis for the energy efficiency test, energy-saving design and energy-saving supervision of electric hoist.
         As a light and small lifting equipment, electric hoist is widely used, simple in structure and highly serialized in products. Taking it as the research object to carry out effective research on lifting machinery is a good starting point. In addition, due to the small size of the electric hoist, it can be tested in the laboratory with relatively small investment, so the energy efficiency test research of the electric hoist also has good feasibility.
       The energy efficiency evaluation of electric hoist will be a pioneer in the research of energy efficiency evaluation in the field of lifting machinery, and the energy efficiency research of electric hoist will also provide a very useful reference for the follow-up research of energy efficiency evaluation of other lifting machinery.

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