LUCY is a decentralized rental community based on blockchain technology. Within this decentralized blockchain network, it connects global idle properties and consumers through sharing. Leveraging the tens of trillions of dollars in market demand for long-term and short-term rentals worldwide, LUCY aims to increase the utilization rate of idle real estate resources globally. It provides a trustworthy, transparent, and traceable multi-party collaborative solution for property owners, operators, and renters, achieving a win-win goal of high returns, efficiency, and quality for all parties involved. LUCY will provide free property management SaaS systems to property owners and operators, enabling the digitization of offline property and occupancy information. It offers a full suite of Internet of Things (IoT) products, including smart locks, energy-saving devices, smart furniture, and fire safety solutions, to standardize online information. It captures credible data from rental activities via IoT devices onto the blockchain, creating a distributed ledger for the global rental industry. LUCY also offers services such as crowdfunding, supply chain finance, and upstream-downstream collaboration to operators. For consumers, it provides high-quality, cost-effective, and more secure rental products.