4th International Conference on Nanomaterials Science and Mechanical Engineering University of Aveiro, Portugal, July 6-9, 2021 ( ICNMSME-2021 ) looks for significant Modern Problems of Nanomaterials Science and Mechanical Engineering, to provide a platform to the global researchers and practitioners from both academia as well as industry to meet and share cutting-edge development in the fields, to give possibility for young scientists and students present results and find your place in the future world.