We developed a brand-new method that fits the non-invasive blood component concentration measurement: the dynamic spectrum (DS) method. With use of this method, it was possible to eliminate the main interference of the individual discrepancy and extract some kinds of the blood component concentration by the analytic method. The definition, principle and measure method of the dynamic spectrum are presented in this paper. According to the theory, this method can get rid of main influence from the skin individual discrepancy theoretically. The achievement, study progress and remain work of this method are also introduced in this paper. Three kind of study of the DS are discussed in this paper.