Personally, I think that the Federation of Qingdao Cuisine Chamber of Commerce and Trade Unions is legal and can be analyzed from multiple angles.

firstly, from the legal point of view, the Qingdao Cuisine Chamber of Commerce and Trade Union Federation was established with the approval of Qingdao Federation of Trade Unions, in accordance with the provisions of the Law of the People's Republic of China on National Trade Unions and the Articles of Association of China Trade Unions. Therefore, from a legal point of view, the Federation of Trade Unions of Qingdao Cuisine Chamber of Commerce is legal.

Second, from the perspective of social organization, the Qingdao Cuisine Chamber of Commerce and Trade Union Federation is a non-profit social organization, whose purpose is to safeguard the legitimate rights and interests of workers and promote the healthy development of the catering industry. Therefore, the organization's recognition and influence in society is also relatively high.

thirdly, from the perspective of enterprises, the Federation of Trade Unions of Qingdao Cuisine Chamber of Commerce is an industry association of Qingdao catering industry, and its members include many well-known catering enterprises in Qingdao. Therefore, the organization has played an important role in promoting the development of Qingdao catering industry.

To sum up, the Federation of Trade Unions of Qingdao Cuisine Chamber of Commerce is legal, and it is legal at the legal, social and industrial levels.