The invention relates to a human body component detection and analysis method applied on an intelligent healthy stool. The method comprises the steps of user logging-on, inputting information of gender, age, height and body weight; placing two feet on electrodes on floor in front of the stool by the user, gripping electrodes on two armrests at two sides of the stool by two hands, and applying a weak constant AC current on the human body through the electrodes; measuring testing indexes of total water, extracellular fluid, intracellular fluid, inorganic salt, protein, fat content, muscle amount, body fat rate, bone mass and body weight of the human body, and packing the detected human body component data and transmitting the packet to a displaying unit; analyzing the human body component data packet by the displaying unit, generating an evaluation report on the human body health of the user according to an analysis result, and displaying the evaluation report on an intelligent bathroom mirror. A controller according to the invention can perform analysis on user health according to the detected user body component information and furthermore displays an analysis report to the user on the displaying unit. The method of the invention can be used for performing daily health monitoring on the user body.