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This research aimed to investigate and compare mosquito larvae species at Varee Chiangmai School, Mueang District, Chiang Mai, and disseminate the findings within the school and local community. The study area was defined within Varee Chiangmai School, specifically focusing on the workshop area and the overgrown vegetation near the school. In studying the mosquito larvae species, Mosquito larvae samples were collected weekly, every Friday, for a period of five weeks, starting from January 17, 2025, and ending on February 14, 2025. The collected larvae were carefully placed in prepared containers for further analysis. Studying Mosquito Larvae Species: The collected mosquito larvae were examined using a stereomicroscope to identify their characteristics. The larvae were placed in a petri dish with a small amount of water to facilitate observation under the microscope. The identified characteristics of the mosquito larvae were recorded using GLOBE Mosquito Habitat Mapper. Additionally, Studying Water pH and Temperature in the Survey Area. To studying water pH using a Universal Indicator: Water samples were collected from three different points within the study area. A universal indicator was used to determine the pH of the water samples. The universal indicator was immersed in each water sample, and the resulting color was compared to the pH scale to determine the pH level. The results were recorded for further analysis and to study water temperature in the survey area: Water temperature measurements were taken at the same three points where water samples were collected for pH analysis. A thermometer was used to measure the water temperature. To avoid direct hand contact affecting the temperature readings, a string was attached to the thermometer for immersion and retrieval. The thermometer was immersed in the water at each point, and the temperature readings were recorded. The research revealed as follows: 1) Water pH: The average pH of water in the workshop area was found to be 6.4, indicating a slightly acidic condition. The average pH of water in the overgrown vegetation was 6.7, also slightly acidic but less acidic than the workshop area. 2) Water Temperature: The average water temperature in the workshop area was 23.68 degrees Celsius. The average water temperature in the overgrown vegetation was 22.68 degrees Celsius. 3) Mosquito Larvae Species: A total of 81 mosquito larvae were found in the workshop area, comprising: 32 Aedes Aegypti larvae (39.5%), 15 Anopheles larvae (18.5%), 22 Culex larvae (27.2%), and 12 Mansonia larvae (14.8%). A total of 82 mosquito larvae were found in the overgrown vegetation, comprising: 16 Aedes Aegypti larvae (19.5%), 36 Anopheles larvae (43.9%), 9 Culex larvae (11%), and 21 Mansonia larvae (25.6%). These findings indicate that the water temperature in the overgrown vegetation was lower than in the workshop area, resulting in different dominant mosquito larvae species. This suggests that environmental conditions influence the breeding of different mosquito larvae species, supporting the research hypothesis that higher water temperatures correlate with a decrease in mosquito larvae populations, depending on the study area.