1. An MFA (Metabolic Flux Analysis) information system comprising a computer operatively arranged with a computer readable medium storing a program executable by said computer for generating, editing, storing and visualizing an MFA model feature and an MFA object and editing, storing and visualizing the result obtained by performing MFA based on the MFA object, the system comprising: an MFA model feature authoring tool for generating a DID (Document Type Definition) or schema file of XML (eXtensible Markup Language) from an MFA model feature, wherein the MFA model feature comprising metabolic network information, metabolic condition information, MFA result information and MFA visualization information is generated, collected and edited prior to generation of the DID or schema file of XML; an MFA object authoring tool for generating a new MFA object with reference to the DID or schema file of XML generated by the MFA model feature authoring tool or storing an edited MFA object in the XML file after editing the existing MFA object; and an MFA object analysis browser for reading the DID or schema file of XML generated by the MFA model feature authoring tool and the XML file stored by the MFA object authoring tool to visualize the MFA object, carrying out MFA based on the MFA object to obtain an MFA result, and visualizing by integrating the MFA result with MFA object information; and wherein the MFA model feature authoring tool comprises: a means of defining a new MFA model feature name, types of metabolic network information, metabolic condition information, MFA result information, MFA visualization information, a data type and a storing method to obtain a defined MFA result; and a means of changing the related existing MFA model feature name, types of metabolic network information, metabolic condition information, MFA result information, MFA visualization information, a data type and a storing method of the edited MFA model feature to obtain a changed MFA result.