A data collection and transmission system comprising: a device configured to transmit device information related to a state of the device; and a data collection server configured to receive the device information; the data collection server including an evaluator configured to determine if the received device information is first device information that is not an object of priority transmission, or second device information that is an object of priority transmission; and a data collection server transmitter configured to send the received device information to a management server that manages the device information; the data collection server transmitter is configured to transmit the second device information to the management server with priority over the first device information; wherein the data collection server transmitter is further configured to transmit, to the device, time information for correction of the time information kept by the device so that a deviation between the time kept by the device and the time kept by the data collection server is eliminated; the device further comprising: a receiver configured to receive the time information from the data collection server before transmitting the device information; a corrector configured to correct time information kept by the device so that a deviation between the time kept by the device and the time kept by the data collection server is eliminated, based on the received time information; and a device transmitter configured to send the device information to the data collection server at a predetermined timing; the device transmitter is configured to send the device information with time information for the device information based on the corrected time information. a device configured to transmit device information related to a state of the device; and a data collection server configured to receive the device information; the data collection server including an evaluator configured to determine if the received device information is first device information that is not an object of priority transmission, or second device information that is an object of priority transmission; and a data collection server transmitter configured to send the received device information to a management server that manages the device information; an evaluator configured to determine if the received device information is first device information that is not an object of priority transmission, or second device information that is an object of priority transmission; and a data collection server transmitter configured to send the received device information to a management server that manages the device information; the data collection server transmitter is configured to transmit the second device information to the management server with priority over the first device information; wherein the data collection server transmitter is further configured to transmit, to the device, time information for correction of the time information kept by the device so that a deviation between the time kept by the device and the time kept by the data collection server is eliminated; the device further comprising: a receiver configured to receive the time information from the data collection server before transmitting the device information; a corrector configured to correct time information kept by the device so that a deviation between the time kept by the device and the time kept by the data collection server is eliminated, based on the received time information; and a device transmitter configured to send the device information to the data collection server at a predetermined timing; the device transmitter is configured to send the device information with time information for the device information based on the corrected time information. a receiver configured to receive the time information from the data collection server before transmitting the device information; a corrector configured to correct time information kept by the device so that a deviation between the time kept by the device and the time kept by the data collection server is eliminated, based on the received time information; and a device transmitter configured to send the device information to the data collection server at a predetermined timing; the device transmitter is configured to send the device information with time information for the device information based on the corrected time information.