The paper aims to explore the diversified design ideas and practices of public facilities in subway stations. Subway is an important travel tool in people's daily work and life, and it is also a good choice for non-local passengers to complete their journey. First of all, the subway station's orientation, culture and service facilities are summarized, its positive significance to urban traffic and urban culture is summarized, and the necessity of the design and research of related facilities is pointed out. Secondly, under the guidance of principles, the specific principles of structure, function and aesthetics are listed. Finally, from the perspective of integrity, the systematic coordination design of all aspects is attempted, the regional cultural elements are tried to integrate into the facility design from the cultural perspective, and the respect and expression of various facilities to people-oriented are analyzed from the perspective of humanization. Starting from the needs of the audience and the development of the times, the public facilities of subway stations carry out diversified design attempts for specific aesthetic and functional needs, which can meet people's psychological demands and aesthetic appeal, bring the audience more comfortable experience, and let the subway station become richer life vigor.