The invention discloses a server and a server-based temperature alarm method and system. The temperature alarm method comprises the steps of collecting the temperature value of an air outlet of the server; acquiring a wind speed value of a server cooling fan; performing temperature compensation on the acquired temperature value, sending the compensated temperature value to a management machine, and comparing the compensated temperature value with a preset temperature threshold by the management machine; sending the acquired wind speed value to a management machine, and comparing the current wind speed value with a rated wind speed value by the management machine; and when the compensated temperature value exceeds a preset temperature threshold value and/or the current wind speed value is smaller than a rated wind speed value, giving an alarm and displaying alarm information. According to the invention, the temperature compensation values corresponding to different actual temperature values of the CPU can be accurately judged, so that the alarm notification is more accurate, and the operation reliability of the server is improved.