Himalayan vulture (Gyps himalayensis) is preference to nest on the high cliffs (from 2400m to 4800m asl.). It is an almost endemic species to China and it is relatively rare in neighboring countries. Research on the behavior is very difficult and methods are primitive. We search about hundred nests by the line survey and questionnaire methods in Tianshan. To survey and monitor the mating and other nest behavior of Himalayan Vulture during the breeding period, we set infra-red cameras near nests from 2013 to 2015. The behavioral scanning method also used in it. The cameras took about 110 thousands photos, we selected 2150 valid photos. Seven types of behaviors were identified as mating, nesting, resting, alerting, maintain, locomotion and other including all the behaviors not mentioned above. Among which 135 (6.3%) was mating, 403 (18.7%) was nesting, 420 (19.5%) was resting, 375 (17.4%) was alerting, 335 (15.6%) was maintain, 200 (9.3%) was locomotion, 282 (13.1% ) was other. Mating behavior was the highest at 13:00-14:00 during the study period, which has a close relation with air temperature. The peak of nesting occurred 11:00, 13:00 and 15:00. After each nesting peak, a short trough often appeared behind it. In winter food shortage is a big problem during the breeding period. Photos show the predators into the vulture nest, such as eagle owl (Bubo bubo) and snow leopard (Uncia uncia), the reproductive of vulture was probably prolonged and ending due to the disturbance by predators.