HKU Unmanned Aerial System Team (HKU UAS) is dedicated to form a community of Unmanned Aerial Vehicles (UAV) enthusiasts and its associated systems, consisting of two technical teams: Mechanical Team and Computer Science Team. The team aims to join the Student Unmanned Aerial System (SUAS) competition, situated in Maryland, U.S.A. The competition requires the team to design a UAS capable of Autonomous Flight, Obstacle Avoidance, Object Detection, Classification and Localization, and Package Delivery. HKU UAS is also developing FPV (First person view) racing drone and promotes the drone racing activities to the students. For future development, the team aims to develop real-time obstacle avoidance for the UAV and build new types of UAV, such as hybrid VTOL (Vertical take-off and landing) UAV.