To develop green ship has an important significance to China's shipbuilding industry. It can promote China's shipbuilding industry to transform and upgrade, also can make China's shipbuilding industry more powerful. The article defines the concept of green ship, analysis the green ship technology development hotspots in worldwide. Based on the in-depth analysis of the current situation and existing problems of China's green ship technology, development ideas, objectives, and key tasks in the entire life cycle (design, construction, operation and demolition) are put forward.