A position adjusting device includes a first support member, a yaw axis motor disposed on the first support member, a second support member rotatably disposed on the first support member through the yaw axis motor, and a pitch axis motor disposed on the second support member and used for driving the load to rotate. The yaw axis motor is used for driving the second support member to rotate about a yaw axis to cause the load to rotate about the yaw axis. The pitch axis motor is used for driving the load to rotate about a pitch axis.