Based on a new ternary logic(triad logic), triad philosophy and triad science are introduced. In triad philosophy, triad ontology, triad methodology and triad epistemology have been developed. In triad science, The concept of quantity coordinate is introduced and that the idea of quantity|space|time cannot be separated is established. Einstein gravitational field, Maxwell electromagnetic field and Yang|Mills gauge field have been unified in form with a unified action. Eleven dimension field and vacuum are interpreted by the unified theory. A new triad cosmos model and the idea of substance generation have been proposed. With triad methodology, a new unified philosophical and scientific system has been established for combining all human knowledge together as a whole. Based on a new ternary logic (triad logic), triad philosophy and triad science are introduced. In triad philosophy, triad ontology, triad methodology and triad science have been developed. In triad science, The concept of quantity coordinate is introduced and that the idea of quantity | space | time can not be separated is established. Einstein gravitational field, Maxwell electromagnetic field and Yang | Mills gauge field have been unified in form with a unified action. Eleven dimension field and vacuum are interpreted by the unified theory. A new triad cosmos model and the idea of ​​substance generation have been proposed. With triad methodology, a new unified philosophical and scientific system has been established for combining all human knowledge together as a whole.