The invention relates to an optical recognition switch device. The optical recognition switch device includes a light emitting device for emitting light, a light recognition device for recognizing the light, and a switch unit. The light recognition device includes a light wavelength analyzer, a modulator and a memorizer. The light wavelength analyzer comprises a light wavelength detector and a signal processing module. The light wavelength detector includes a detecting element and a measuring device. The detecting element comprises a carbon nanotube structure. The carbon nanotube structure includes a plurality of carbon nanotubes oriented along a same direction. The measuring device is configured to measure a temperature difference or a potential difference of the carbon nanotube structure. The signal processing module is used to get signal data by analyzing the temperature difference or the potential difference and compare the signal data with initial signal data and send working orders.
Optical recognition switch device