Ha Giang is considered as one of provinces having the richest bio-diversity of animal resources, and was selected by BIODIVA project for a field study aiming at investigation, assessement of bio-charecteristics, bio-diversity of animal breeds, production systems. Factors including potential or hidden factors influencing bio-diversity and risks of losses of animal bio-diversity were also included in the study for seting up a plan on building microprojects, which were aimed at biodiversity protection and development, valorization of local animal genetics resources, increasing income for local people. Interviews and records were made on 1674 households of different ethnic minorities in 251 villages of 37 communes in the province. Information collected during interviews included: current status of household economics, production systems, breeding activities, origin of animals, animal feeding, diseases, vaccination programs and geography information. A total of 7427 animals including buffalos, bulls, cows, pigs, chickens, goats and ducks were used for bio-sampling and describing phenotyes of animals. Bio-samples and phenotypes of animals were further used for a monocular genetic analysis and assessments of phenotype biodiversity. The results of the field study showed that there was a remarkable diversity of phenotypic characteristics and animal¿s genetic resources by topography, ethnic groups in HaGiang province.