1. Introduction 2. Volcanic rocks architecture and sequence 3. Patterns of Volcanic Reservoirs 4. Characteristics and Models of Volcanic Gas Reservoirs 5. Percolation Mechanism and Development Law of Volcanic Gas Reservoirs 6. Development Performance Description and Prediction Model of Volcanic Gas Reservoirs 7. Development Techniques for Volcanic Gas Reservoirs 8. Development Practices of Volcanic Gas Reservoirs