1. A multi-scale analysis device for performing a finite element analysis of a structure, from a global structure to a micro-structure, comprising: an analysis result storage device for storing information of coordinates and displacements of respective nodes and distortions of respective elements in a finite element analysis result of a global model wherein the structure has been mesh-divided; a first calculation formula storage device for storing a first calculation formula for determining a constant term and a first-order coefficient of a quadratic function of coordinates from the coordinates and displacements of the respective nodes of the global model, the quadratic function representing a displacement of each node of a micro model wherein the structure is mesh-divided finer than the global model; a second calculation formula storage device for storing a second calculation formula for determining a second-order coefficient of the quadratic function from the coordinates and distortions of the respective nodes of the global model; a distortion calculation device for calculating a distortion of each node of the global model from distortions of a plurality of elements existing in a vicinity of the node; a distortion storage device for storing information of the obtained distortion of each node; a displacement calculation device for calculating the constant term and first-order coefficient from the coordinates and displacements of the respective nodes of the global model using the first calculation formula, calculating the second-order coefficient from the coordinates of the respective nodes of the global model and the distortions of the respective nodes stored in the distortion storage device using the second calculation formula, and calculating a displacement of each boundary node of the micro model using the obtained constant term, first-order coefficient, and second-order coefficient; a displacement storage device for storing information of the obtained displacement of each boundary node; and an analysis device for performing a finite element analysis of the micro model using the displacement of each boundary node stored in the displacement storage device as a boundary condition of the micro model and outputting an analysis result.