The utility model discloses an in-situ gas dynamic monitoring device based on unmanned aerial vehicle transportation and visual point selection. The system comprises an unmanned aerial vehicle systemand an in-situ detection system, The unmanned aerial vehicle system comprises an up-down lifting type unmanned aerial vehicle body and a wireless controller. the in-situ detection system comprises anannular base and an inverted bowl-shaped gas collection cover; the lower edge of the gas collecting hood is hermetically connected with the inner ring surface of the annular base; The annular base iscomposed of an upper half base and a lower half base. the upper half seat and the lower half seat are clamped and fixed up and down; Horizontal rotatable fit, wherein a motor is fixed on the upper half seat, an air inlet pipe and an air outlet pipe are fixed on the upper half seat, a first gas detector is mounted on the air inlet pipe, a second gas detector is mounted on the air outlet pipe, a plurality of annular convex pieces are arranged on the lower surface of the lower half seat, and a battery, a control chip and a wireless signal transmitter are fixed on the upper half seat. The device has the advantages that the device can reach a detection place in an invisible manner in a flying manner, the sealing effect is good, and the measurement is accurate.