Diversity of aquatic macroinvertebrate and conservation management was studied in Taungthaman Lake, during November 2018- February 2019. In order to bioassay water quality and aquatic health analysis using diversity indices. Species richness values of 15, 15, 18 and 31, evenness values of 0.78, 0.82, 0.78, and 0.71, Shannon-Wiener Index values of 3.06, 3.04, 3.25 and 5.63, and Simpson’s index values of 0.133, 0.117, 0.100, and 0.074 were determined for macroinvertebrates. In the present study, low diversity indices, like the Shannon-Wiener Index, demonstrated that the lake is polluted and poor health status. Taungthaman Lake supports a highly productive freshwater capture/culture fishery and also an important tourist attraction. Although the lake is highly valuable in its natural state, it is also highly vulnerable to the impact of external factors. Therefore, it is necessary to prevent and conservation management of aquatic environment of lake health.