Abstract:6.1 Introduction6.2 Cooling methods for superconducting magnets6.3 Cryogenics issues: cooling sources, heat sources and measurement6.4 Cryostat construction6.5 Cooler performance6.6 Thermometry6.7 Development and applications of cryogenics for HTS systems6.8 Challenges and requirements6.9 Typical guidelines for cryogen-free magnet systems6.10 Conclusions6.12 Acknowledgement