Climate change is one kind of erratic behaviors and hazards of environmental consequence such as flood, flash flood, drought, heat & cold waves, cyclone, high and low tide, river bank erosion, salinity intrusion etc. A qualitative study approaches (FGD & KII) was performed from July-December, 2022 to explore the changes of vulnerable peoples' ecological migration perspective in disaster affected southern part of Bangladesh. Results: People usually move to the nearest town and peri-urban areas for seeking the job due to concurrent cyclone, storm surge, flood in the coastal areas. The effect of disasters causes recurrent saline water to increase the relocation of vulnerable peoples to consider livelihood exploration in alternative areas. This is a periodic trend of migration not permanent. Yet, several people normally staying in place temporarily are engaged in shrimp and crab fattening farming, small agri-business, extracting natural resources such as honey and wood collection from mangrove forest Sundarban, catching necessary fishes from the river. The respective fishermen who transform their fishing location seasonally and voluntarily.