The 4th International Conference on Mechatronics and Mechanical Engineering (ICMME 2025) will be held in Dalian, China during August 22-24, 2025. ICMME has been successfully held for three sessions, the conference aims to be an important forum for researchers and scholars from multiple disciplines to come together to share knowledge, discuss ideas, exchange information, and learn about cutting-edge research in diverse fields with the common theme of mechatronics and mechanical engineering. The 4th International Conference on Mechatronics and Mechanical Engineering (ICMME 2025) invites the submission of original research papers in the related fields of Mechanical Engineering and Mechatronics Technology to be published in the conference proceedings. Each submission is anonymously reviewed by an average of three independent reviewers, to ensure the final high standard and quality of submitted papers. Accepted papers will be presented as either oral or poster at the conference. Contributions are sought in the following areas: Mechanical Engineering Applied mechanics Biology mechanics Computational fluid dynamics Combustion and fuel Green manufacturing Meters and instruments Modeling and simulation Automation Internal combustion engine Robot technology Nanotechnology Solid mechanics Energy system Power & control system Mechatronics Technology Biological mechatronics Fluid mechatronics Computer mechatronics Opto mechatronics Robotic automation and control Electronic science and engineering Mechanical and electrical equipment maintenance and management Electricians and electronics Motor speed control technology Electrical control and PLC Sensor technology Intelligent optimization algorithm Microelectronic technology Other related topics