Method and device for monitoring network connection state of network equipment

The invention discloses a network connection state monitoring method and device of network equipment. The method comprises the following steps: periodically detecting a network connection state of target network equipment according to an internetwork control message protocol; detecting a network connection state of the target network equipment according to a transmission control protocol when continuously detecting that the number of times that the target network equipment has the communication timeout of the internetwork control message protocol exceeds a first preset threshold value; when it is continuously detected that the number of times of transmission control protocol communication timeout of the target network equipment exceeds a second preset threshold value, determining that the target network equipment is offline; and sending an offline notification message to the target terminal, the offline notification message at least comprising the device information and the offline time ...