Astrological Psychology is a branch of psychology which uses Astrology as a diagnostic tool. It is primarily based on the insights of depth psychology, but also on humanistic and transpersonal psychology. In concept it is closest to Robert Assagioli's Psychosynthesis.

Astrological Psychology starts from the concept of a living, self-regulating and inherently healthy being and not, like most psychologies, from the standpoint of pathology. "You are sick only for as long as you think you are" and to find the causes for our feelings of dis-ease is the central tenet of astrological psychology.

The basic purpose of Astrological Psychology, through its teaching, advisory or therapeutic approach, is to increase our understanding and to stimulate our own thought processes. It is not to dish out ready-made recipes, nor to offer easy solutions but, in short, to offer us a useful instrument for self-discovery so that we can learn to accept ourselves for what we are and what we may be, as this will enable us to live freer, happier and more creative lives.

First and foremost it offers a holistic approach to our human condition. This does not just apply to psychological concepts, as it includes our choice of astrological techniques. The methodology of Astrological Psychology therefore has to comply with the prerequisite that all its constituent parts have to work together to form a coherent whole. It is therefore, a method complete in itself, but it does not have to be closed to further developments or refinements.

Even so, it was for this very reason unavoidable that some techniques of traditional astrology had to be excluded because, although logical and valid within themselves, they did not fit into the whole picture. For example, techniques not used are those which depict man as being dependent and without free will, plus those which create a "loop" effect and thereby distort the whole picture.