A dynamic entrance controlling system for performing entrance control of a gate, comprising: a first wireless signal receiving device set away from the position of the gate and configured for sensing wirelessly a wireless signal emitting device at a first time point, so as to obtain ID information of a target; a second wireless signal receiving device set close to the position of the gate and configured for sensing wirelessly the wireless signal emitting device at a second time point, so as to obtain the ID information of the target; an image capturing device configured for receiving a trigger to capture a real-time image information of the target; and a host electrically connected to the first wireless signal receiving devices, the second wireless signal receiving device and the image capturing device, configured for deciding whether to open the gate; characterized in that the host is configured for performing the following steps only when the second time point is later than the first time point and the ID information obtained by the second wireless signal receiving device is the same as the ID information obtained by the first wireless signal receiving device: reading a pre-stored image information of the target according to the ID information, triggering the image capturing device to capture the real-time image information, comparing the pre-stored image information with the real-time image information to conduct an identity recognition to the target and opening the gate after the identity recognition of the target is successful. a first wireless signal receiving device set away from the position of the gate and configured for sensing wirelessly a wireless signal emitting device at a first time point, so as to obtain ID information of a target; a second wireless signal receiving device set close to the position of the gate and configured for sensing wirelessly the wireless signal emitting device at a second time point, so as to obtain the ID information of the target; an image capturing device configured for receiving a trigger to capture a real-time image information of the target; and a host electrically connected to the first wireless signal receiving devices, the second wireless signal receiving device and the image capturing device, configured for deciding whether to open the gate; characterized in that the host is configured for performing the following steps only when the second time point is later than the first time point and the ID information obtained by the second wireless signal receiving device is the same as the ID information obtained by the first wireless signal receiving device: reading a pre-stored image information of the target according to the ID information, triggering the image capturing device to capture the real-time image information, comparing the pre-stored image information with the real-time image information to conduct an identity recognition to the target and opening the gate after the identity recognition of the target is successful. reading a pre-stored image information of the target according to the ID information, triggering the image capturing device to capture the real-time image information, comparing the pre-stored image information with the real-time image information to conduct an identity recognition to the target and opening the gate after the identity recognition of the target is successful.