In this study the Fenugreek seeds are converted to nanoscale and tested for dye degradation, and additionally its thermal withstand range is founded. The size of the particle is confirmed in nano-range with the help of the particle size analyser, and its capacity of dye absorption is analysed by the results of ultraviolet-visible spectroscopy taken at different interval time periods, and the thermal withstand range of fenugreek nanoparticles is measured using thermogravimetric analyser.