Abstract: Quantum cloud computing allows users around the globe to gain access to quantum computing hardware at little cost by providing time-sharing services via the internet, which greatly enhances the utilization of prohibitively expensive quantum hardware resources. This technology brings together the quantum research community and all outsiders who are enthusiastic about quantum computing. Hence, quantum cloud computing has become the driving force for promoting the popularization of quantum computers and cultivating quantum ecosystems. The advance of quantum cloud technology will enable users to implement quantum computing for real-world applications in an effective way. In this article, we focus on the concept of quantum cloud computing based on superconducting architectures. The working principles and hardware of this technology, both past and present, will be briefly discussed. A roadmap for its development, including scientific and technical challenges, will be delivered as the last part of our discussion. It is our hope that the content presented here can help readers grasp the general idea of quantum cloud computing this unprecedented but exciting and rapidly evolving field.