The present invention relates to a smart key system for farming machines and, more specifically, provides a smart key system for farming machines, which comprises: a smart ponder; a control unit having an MCU, a data decoding unit, an audio control unit, a battery detection unit, a sensor input unit, and a power supply control unit; a sensor unit having a GPS module, an inclination angle sensor, a door sensor, and a vehicle interior sensor; and a smart key communication unit communicating with an input unit having a switch input unit and a display device and the smart ponder through an RF module and an LF module.;COPYRIGHT KIPO 2016
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