Abstract: As a new technology stack, blockchain applications are infiltrating into different financial scenarios, by exerting disruptive effects. At the same time, they are facing various challenges, from technical limitations, security and extensibility requirements, to policy restrictions. Rational thinking is essential, which involves understanding the essence of blockchain technologies, knowing how to apply technology to the appropriate scenario, recognizing major safety and scalability bottlenecks andbeing prepared for different levels of risks that may arise and solving the technological challengesand assisting to build the regulatory legal system. In launching a project of financial blockchain as a service platform, a three-step systematic solution is proposed. Firstly, usingthe model-driven architecture in system modeling and software architecture design, different perspectives of technologies and business processesare separated. Secondly, an open and win-win ecology is constructedby building an one-stop BaaS Platform system. Thirdly, multi-chain technologies are appliedto meet the different business requirements. This projectsuccessfully verifies the feasibility and reliability of cross-organization blockchain alliance in a real-world scenario of technology finance. Looking into the future, blockchain technologies can achieve more practical applications in more areas, for example, in financial sectors, digital assets, supply chains, shared economy and so on.

Key words: blockchain, financial industry, digital assets, smart contract, regulatory