The invention discloses a power grid monitoring terminal and a power grid monitoring system. The power grid monitoring terminal includes a collection device used for collecting state data of a power grid; a processing device connected with the collection device and used for processing the collected state data; an encryption device connected with the processing device and used for acquiring the state data from the processing device, encrypting the state data and returning the encrypted state data to the processing device; a communication device used for sending the state data encrypted by the encryption device to the external; a self-powered device used for supplying electric power for the collection device, the processing device, the encryption device and the communication device. Therefore, with the self-powered device, regular maintenance and battery change of maintenance staff are avoided, so that the maintenance cost is reduced. With the encryption device connected with the processing device, communication safety is improved.