The preaching is actual and essential power,strength since the begining of Islam and throughout in every era.The Holy Quran is the basic source of preaching.As Allah (S.W.T) choosen His most pious and righteous persons for preaching,so in this context The Holy Quran determines the objectives of {Nabuwat & Risalat} and estimated consequences of preaching,reasons and motives of dissidence in the way of preaching as well as the basic principles of successful preaching.The Holy Quran has it''s own way to preaching which is quiet distinct and unique that really dominate all cognitive and psychological aspects of human nature.When befalling orders in The Holy Quran whether these were about beneficence or about evil, awareness of previous nation''s circumstances or predictions about future, to motivate towards heaven or appal them from the way to hell, to ensure the mercifulness of Allah (S.W.T) or horrify them of His wrath The Holy Quran is the basic sourse of such communicative measures which have strong command over human psychology.When The Holy Quran adresses i t considers al l aspects of human nature l ike thei r capacity,temperament,apptitude,tends motives,particular needs.All these factors have strong harmony with human instinct and psychological improvment.The Holy Quran has a lot of potential and vigour in this regard.The psychological ascendence of preaching method of The Holy Quran will be discussed and it will be tried to highlight it''s significance.