Download method, guidance method and device of safe main control chip Coolcloud system (COS)

The invention discloses a download method, a guidance method and a device of a safe main control chip Coolcloud system (COS). The download method of the safe main control COS comprises receiving a download instruction sent by an upper computer, analyzing whether a COS contains sensitive information or not according to the download instruction, and downloading the information contained by the COS to a safe main control chip by using a corresponding download mode according to an analysis result. The guidance method of the safe main control COS comprises detecting whether the COS contains the sensitive information or not after the safe main control chip is powered on, conducting an integrity detection to the COS saved on a program memory by using a corresponding detection mode according to a detection result, and conducting guidance to the COS when the COS passes the integrity detection. The download method, the guidance method and the device of the safe main control chip COS resolve the problem that a big security hole of a firmware exists in the processes of COS download and COS guidance in the prior art, and improve the safety of the safe main control chip.