ALL CREATIONS Mobile Art Museum by YOUCISHAN is a portable museum set up at music festivals, letting visitors enjoy art exhibitions alongside live music. Built with modular design, all unit modules are prefabricated in a factory, allowing rapid assembly for exhibitions. After the event, modules can be quickly dismantled and reused for future events. This saves time, cuts labor costs, and reduces overall construction expenses. Material choices prioritize sustainability, mainly using renewable timber and polycarbonate panels. Structural connections employ ready-made metal connectors, improving efficiency, reducing reliance on skilled labor, and lowering costs. The design challenges traditional exhibition spaces, which are often single-use and hard to reuse. Through modular, detachable design, this museum enables circular use of materials and space, offering flexibility for different exhibition needs. ALL CREATIONS Mobile Art Museum is not only a low-cost, high-efficiency exhibition space but also a model of sustainable design. Using modular design, prefabricated components, and renewable materials, it shows how to achieve environmental protection and efficient resource use while cutting construction costs.