| The present disclosure provides a method of deodorizing, antibacterial and decontamination using a surface plasmonic photocatalyst and a use of medicinal composition for treating cancer, and the method of deodorizing, antibacterial and decontamination using the surface plasmonic photocatalyst includes the steps as follows. A surface plasmonic photocatalyst is provided. The surface plasmonic photocatalyst is made to be in contact with an object to be treated. The surface plasmonic photocatalyst is made to absorb an electromagnetic wave to perform a deodorizing, antibacterial and decontamination reaction on the object to be treated. A wavelength of the electromagnetic wave is 300 nm to 11000 nm. Therefore, the surface plasmonic photocatalyst of the present disclosure can absorb thermal radiation from the environment without the need to provide additional ultraviolet light or visible light, to achieve the purposes of deodorization, antibacterial, decontamination and preparation of a therapeutic drug for treating cancer. |