In recent years, the market-oriented economy is becoming increasingly international,and the standardization demands of markets are higher and higher. ISO3834 welding quality system for fusion welding of metallic materials is one of effective ways to connect international markets and welding manufactures,and also is a necessary qualification to cooperate with some relative international corporation.With the introduction and promotion of this series of standards,it is accepted and recognized well by more and more enterprises. The structure of ISO3834 welding quality system for fusion welding of metallic materials is introduced,and combining the actual application of enterprises,the requirements and main work matters of this quality system are introduced from the qualification of welding personnel,welding procedure qualification report（WPQR）,welding filler material management and welding workshop management.