Proceedings of FSDM 2018. Big Data Analytics is on the rise in the last years of the current decade. Data are overwhelming the computation capacity of high performance servers. Cloud, grid, edge and fog computing are a few examples of the current hype. Computational Intelligence offers two faces to deal with the development of models on the one hand, the crisp approach, which considers for every variable an exact value and, on the other hand, the fuzzy focus, which copes with values between two boundaries.This book presents 114 papers from the 4th International Conference on Fuzzy Systems and Data Mining FSDM 2018, held in Bangkok,