Dynamics of “Miang” under climate changed in Northern Thailand was investigated 3 mains proposes were 1) the study of ecological characteristics of Camellia sinensis var. assamica (Miang tea) 2) application of fermented tea leave and fermented tea processing water for medicinal and pharmaceutical potential and 3) the supply chain analysis of Miang in northern of Thailand. The four villages of study sites. The result shown that; species composition in “Miang” tea garden found vegetation species around 14 to 22 species. Soil fertility at surface soil was higher than sub-surface soil. Eight types of crude extract including ethanol crude extract of pickled tea leave and ethanol crude extract of fresh tea leave were investigated to antibacterial activity. Antibacterial of all crude extracts were inhibited the growth of bacteria including Bacillus cereus, Escherichia coli, Pseudomonas aeruginosa, Propionibacterium acnes, Staphylococcus aureus and S. epidermidis. The highest inhibition effect of ethanol crude extract of pickled tea leave were P. acnes and the strongest inhibition effect of ethanolic crude extract of fresh tea leave were P. acnes, followed by S. epidermidis, B. cereus, S. aureus and E. coli. The analysis is interpreted both quality and quantitative form. It can be shown that the return is worthiness to investment in all areas. The study of supply chain in those found that the complexity of supply chains is not complicate, the stakeholder within supply chain composed of the farmer. The extended supply chain might be used for development of supply chain of Miang to manage the risk of cultural impact. Moreover, the concept of investor for joint venture should be applied to the project for maintain the balance of sustainable development.