  Site-testing is crucial for achieving the goal of scientific research and
analysis of meteorological and optical observing conditions is one of the basic
tasks of it. As one of three potential sites to host 12-meter Large
Optical/infrared Telescope (LOT), Muztagh-ata site which is located on the
Pamirs Plateau in west China's Xinjiang began its site-testing task in the
spring of 2017. In this paper, we firstly start with an introduction to the
site and then present a statistical analysis of the ground-level meteorological
properties such as air temperature, barometric pressure, relative humidity,
wind speed and direction, recorded by automatic weather station with standard
meteorological sensors for two-year long. We also show the monitoring results
of sky brightness during this period.
