Abstract: The exploration of liquid oceans beneath the icy crusts of icy moons and the investigation of their habitability provide critical clues for understanding the origin and evolution of the solar system， the emergence of life， and the search for extraterrestrial life. This field has become one of the most prominent frontiers in international deep space exploration. Based on a comprehensive review of domestic and international icy moon exploration missions and their key achievements， current development trends are analyzed， the scientific objectives and detection methodologies for icy moon exploration are summarized， and a novel multi-mode exploration concept is proposed combining orbital reconnaissance， surface landing， and deep drilling. Focusing on Enceladus as a primary target， the mission aims to investigate its gravitational field， thermal profile， magnetic environment， potential seismic activity， and geochemical characteristics through mass spectrometry， chromatography， spectroscopy， and biological detection. Concurrently， it will collect natural samples to analyze elemental and isotopic compositions， thereby advancing our understanding of Enceladus' habitability.  Critical technologies requiring breakthroughs are further identified， including next-generation detection payloads and high-precision analysis of biogenic elements. The implementation of such icy moon exploration missions will significantly enhance China's technological capabilities in deep space exploration and strengthen its leadership in planetary science.

Key words: Icy Moon, Habitability, liquid ocean, mission concept, target of detection