Journal of Fuzzy Extension & Applications(JFEA) is an international scholarly open access, interdisciplinary, fully refereed, and quarterly free of charge journal as a non-commercial publication. The publication start year of JFEA is 2020 and affiliated with Ayandegan Institute of Higher Education. All submitted manuscripts are checked for similarity through a trustworthy software named iThenticate to be assured about its originality and then rigorously peer-reviewed by the international reviewers (The similarity rate must be below 20%). JFEA is a peer-reviewed journal publishes original research papers, reviews, case studies, short communication and innovative research studies, covering all aspects on theoretical and applied papers of fuzzy sets and their generalization such as “intuitionistic fuzzy sets”, “Pythagorean fuzzy sets”, “Fermatean fuzzy set”, “q-rung orthopair fuzzy sets”, “dual fuzzy sets”, ”connection number”, ”D- number”, “picture fuzzy sets”, “spherical fuzzy sets”, “hesitant fuzzy sets”,” m–polar fuzzy set”,” neutrosophic sets”, “plithogenic set”,” hypersoft set”, etc. The goal of JFEA is to help promote the advances in the development and practice of fuzzy sets and their generalization in the areas of foundations, mathematics, artificial intelligence, control, robotics, data analysis, data mining, decision making, finance, management, economic, environmental, medical, information systems, operations research, pattern recognition, image processing, soft computing, uncertainty and indeterminacy modeling, and others. The scope of the journal involves fuzzy sets extensions and applications in every branch of science and technology. This journal respects the ethical rules in publishing and is subject to the rules of the Ethics Committee" for Publication (COPE) and committed to follow the executive regulations of the Law on Prevention and Combating Fraud in Scientific Works.This journal publishes fully open access journals, which means that all articles are available on the internet to all users immediately upon publication.