On June 12, 2025, the IEC/TC 21 Technical Committee of the International Electrotechnical Commission officially issued the international standard IEC 63121:2025 Electrical and functional safety specification for lifts, escalators and moving walks, which will officially take effect on December 12, 2025. It is the core general guideline in the field of electrical safety and functional safety of the global elevator industry. The core contents of this standard include: First, clarify the scope of application of the standard, covering all elevators, escalators and moving walks equipped with electrical control systems, applicable to the electrical safety and functional safety management of the whole life cycle of equipment design, manufacture, installation, operation and maintenance, and transformation. Second, establish an elevator electrical safety classification system. According to the equipment use scenario, safety risk level and functional importance, the electrical safety is divided into three grades, and differentiated protection requirements and test standards are formulated for different grades. Third, refine the basic requirements for electrical safety, formulate comprehensive electrical safety design guidelines for elevator power supply systems, control circuits, drive systems, safety circuits and emergency power supplies, and clarify the mandatory technical requirements for insulation protection, overcurrent protection, overvoltage protection, grounding protection and electromagnetic compatibility. Fourth, add special requirements for functional safety, clarify the safety integrity level (SIL) requirements of the elevator electrical safety system, standardize the whole process guidelines for the design, verification and testing of safety-related electrical control systems, and formulate special functional safety standards for electronic safety circuits and intelligent safety monitoring systems. Fifth, standardize the requirements for software security and network security, formulate a whole life cycle management specification for software security development, version management and vulnerability repair for elevator embedded software, control system software and remote operation and maintenance systems, and clarify the mandatory requirements for network security protection, data security and access control. Sixth, refine the environmental adaptability requirements of electrical equipment, and formulate the environmental adaptability design standards and test methods of electrical equipment for different use environments such as high temperature, high humidity, alpine, high altitude, corrosion and dust. Seventh, standardize the requirements for electrical safety testing and inspection, formulate standardized methods and qualification criteria for elevator electrical safety performance testing, functional safety verification, and electromagnetic compatibility testing, and clarify the electrical safety project requirements for equipment factory inspection, on-site installation inspection, and regular inspection. Eighth, standardize the electrical safety maintenance requirements for in-use equipment, formulate standardized specifications for daily maintenance, regular inspection, fault disposal and component replacement of the elevator electrical system, and clarify the core requirements for electrical safety hazard investigation and rectification. After its release, this standard has been launched into the national standard conversion procedure by more than 100 countries and regions around the world such as the European Union, China, the United States and Japan, comprehensively unifying the technical guidelines for electrical safety and functional safety of elevators worldwide.