A pulsation hypothesis leads　a standard model including the gravity. (unified field theory) (A string theory of the elementary particle size.) The standard model (unified field theory) of the elementary particle is considered to be the best terminus ad quem of the theoretical physics now. However, it is not an ultimate theory. (1) Gravitational action is not included in this model. Gravity have a deep connection with structure of time, the space. Gravity must be included in an ultimate theory. (2) I cannot extrapolate a theory to a micro-limit as far as I use the prescription of filing. When I am going to raise the resolution of a monitor projecting a physical phenomenon endlessly, a theory fails somewhere. (3) A supposition without some grounds is included in a standard model. It is said that an electron and the electric charge of the quark make the close integer ratio. It is totally unknown why it becomes the integer ratio. (4) The superstring theory hides the possibility that I can solve all these three problems. However, the conclusive evidence that a theory is fair is not yet obtained, and the inspection by the experiment is considered to be impossibility. The hypothesis of the elementary particle pulsation principle. The pulsation principle includes all of concepts of the standard theory. I cancel all of above problems. (1) I discovered four-dimensional space. I discovered dark energy and dark matter of mystery in the 4-dimensional space. (2)I express mean density of the dark energy as the horizon of energy zero and describe the horizon as unification ground to include all places. The standard model describes quark ground, lepton ground, Higgs place, a gauge field separately. I express it at one place. (3)The dark energy is thin energy to meet vacuum space of the space. The energy triggers repulsion each other and lets you maintain energy density uniformly. It is equivalent with the concept of the standard model saying that it is the aggregate of a minute spring endlessly. (4)I catch a wave of the dark energy as a material wave described by Schrodinger equation and describe nuclear force, gravity, electromagnetism as action of the material wave. I explain the gravity that a standard model was not able to include naturally and include it. I describe differences between gravity and vast po4) (5)The Cal czar Kleine theory standardized gravity and electromagnetic willpower mathematically. Four dimensions of unified field theory of Einstein needs space. However, it was not found. The pulsation principle discovers the four-dimensional space and aims at the unified field theory of Einstein. (6)"The prescription of filing" is unnecessary on the pulsation principle. When "the infinity" calculates an equation of the standard theory, it appears by all means. "The prescription of filing" replaces infinite numerical value with the mass of the particle to handle infinity. It is said that it is a result to treat an elementary particle as a point without the size. (7)"The microdomain theory of Dr. Yukawa" is one case. Means to keep size in an elementary particle, and to evade infinity. It is a longtime problem. (8)The elementary particle pulsation principle solves the problem. (9)The pulsating elementary particle has size intermittently. The elementary particle has mass in "a particle trip and a minus number particle trip". All of mass of the elementary particle converts it into energy (light). "A wave trip." The elementary particle becomes the point that does not have size in the three-dimensional space. It evades infinite contradiction. (10)The pulsating elementary particle continues emitting a material wave as a pulsatile ripple in the neighborhood. The standard theory calculates "modulus" squared of the material wave. It is the existence probability of the particle. It calculates only equilateral energy. The numerical value becomes infinite. The elementary particle pulsation principle, In pulsation of 1 cycle, the total of the energy of the positive and negative becomes zero. The energy grand total includes a symmetry to become zero. Therefore infinity does not occur and does not need prescription of filing.