The invention relates to a dust particle density analysis system which comprises a falling sensing device arranged in a dust removal robot and used for sending out a first control signal when sensingthat the dust removal robot falls, otherwise, sending out a second control signal; The soft cushion release equipment which is arranged below the dust removal robot, is connected with the falling induction equipment and is used for releasing a soft cushion in the dust removal robot when receiving the first control signal and recovering the released soft cushion when receiving the second control signal; The motor driving equipment which is used for determining a corresponding motor rotating speed based on the received dust density so as to drive a dust suction motor of the dust removal robot tooperate according to the motor rotating speed; And the density analysis equipment which is used for identifying each dust particle in the image based on the dust particle image characteristics and determining the corresponding dust density based on the number of the dust particles in the image. According to the invention, the dust removal precision of the dust removal robot can be improved.