A method and a system for teaching and guiding an individual and changing the lifestyle and in building up a health or healthier behaviour includes the step of making a basic assessment of the individual and of defining at least one program to which the individual should attend on the basis of this assessment. The program includes at least teaching, guiding and actively involving the individual and individually gathering personal objective information represented by at least one health indicator. The individual is taught in accordance with a specific learning program in view of understanding a relationship between the objective information and a phenomenon or symptom caused by pathology or functional deficiency. The individual is further taught and guided to understand the effect of specific behaviour and lifestyle on the pathology or functional deficiency. Finally, actions are identified to be taken for changing the lifestyle and for building up a healthier behaviour in view of reducing health problems or health risks.