Disclosed are a control method, a control device and a startup switching device for intelligent terminal startup, where the control method includes: detecting whether a startup switching device is inserted after a power-on trigger signal is received; starting up the intelligent terminal through a first ROM when no startup switching device is inserted; reading specified information in a high definition multimedia interface when the startup switching device is inserted; and starting up the intelligent terminal through a preset ROM when the specified information is preset switching data, thereby solving the problems that the intelligent terminal startup switching is cumbersome and of poor safety by using a jumper cap in the prior art.