Clarification of the Field Concept for a New General System Theory

Field is an essential concept for us to understand the physical phenomena in the universe.Since the field concept was proposed in electromagnetism during nineteenth century,the understanding of the field concept has experienced great changes.This paper re-examines the concept of field from its origin and evolution history,with the purpose of a better understanding of the concept in order to be used in our new general system theory to unify different theories.Our main conclusion is that the concept of field should not be regarded as an independent physical existence but a property of matter of both living and nonliving.Through a discussion on an isolated two-body system from the perspective of gravitational field,a psychic field is introduced to address the active force produced by living creatures with minds.