The invention discloses a face bacterium observation mirror. The face bacterium observation mirror includes a mirror body; switches are arranged on the mirror body; yellow light eye glasses and an observation light source are arranged on the mirror body; the switches communicate with the observation light source; and the yellow light eye glasses match the observation light source. UV light havingthe wavelength of 395 nm emitted from the observation light source irradiates to a skin so as to stimulate secreta-porphyrins of bacteria or Propionibacterium acnes, the observation wavelength of theporphyrins is 405 nm, the fluorescence wavelength is 600 nm, and then fluorescence of the porphyrins is reflected by the mirror, a consumer can filter UV exciting light through the yellow light eye glasses and retain the fluorescence of the porphyrins so as to clearly watch the situation of the porphyrins on a current irradiated face and know the growth and distribution condition of the bacteria or the Propionibacterium acnes, and the consumer can master the face cleaning condition of her face, can purchase correct face cleaning product and skin care products, and can clean and protect infected face parts.