Adsorption method is considered the most efficient and simple method, that requires low cost. In this study, firstly, yeast (Saccharomyces cerevisiae) was used to adjudicate the Remazol Red RB dyes to analyze the efficiency of yeast as adsorbent of textile dyes and determine the particle size, pH, and optimum contact time. Testing particle size parameters are done with variations of 100, 170, and 200 mesh. The optimum condition is obtained in particle size variation in 200 mesh with efficiency (% E) of 56.49%. Subsequent testing was conducted with variations in pH (5.6, 7, 8, and 9). The optimum condition is obtained at pH 6 with efficiency (% E) of 60.35%. The dyestuffs were conquerable with variations in time of 1, 2, 3, 4, and 5 hours, the largest % E gained was 90.01% throughout 4 hours. Secondly, the research also aimed at knowing the isotherm adsorption pattern. Adsorption in Remazol Red RB dyes fulfilled the isotherm pattern of Langmuir with a correlation coefficient (R2) of 0.9521 and the maximum capacity of the yeast adsorption of 0.07 mg/g. Further research is expected to further expand the analysis variation and the type of textile dyes used which can be applied to the actual textile dyes waste.