The present description relates to a frequency-based wake-up device and a sensor communication device using such the same. The present invention comprises: a RF signal to voltage converter for receiving a wireless signal including a first signal and a second signal and converting the frequency of the preamble to voltage to generate a driving voltage and provide the same; a decoder activated by the driving voltage and extracts ID information of the sensor communication device by decoding the second signal; and a signal processor that is activated by the driving voltage and compares the extracted ID information of the sensor communication device by the decoder with pre-stored ID information of a pre-determined sensor communication device and notifies of reception of a wake-up signal when the extracted ID information and the pre-stored ID information are the same.