This paper introduces meta-synthetic methodology advanced by Qian Xuesen,which promotes system engineering to a new phase of complex giant system engineering and social system engineering.

A Theoretic Framework and Application of Complex Giant System;

This paper discusses the characteristic of agricultural complex giant system and puts forward Systematic Integrated Prediction Method of national grain output prediction, the key technique of which is input-occupancy-output technique of complex system, non-linear prediction method and minimum sum of absolute value technique.

Mega construction projects are open complex giant systems, management of which will exert great impacts on the national economy, and modern information technology based and total contents, total process and all-party integrated management is one of the key tools that enhance the project management performance.

the security assurance based on the environment of internet is a complex giant systems, we analsi the information security assurance by using the complex giant systems beginning with the 3 dimension security protection model, also we give a Hall for security assurance s workshop of meta - synthetic engineering model and its administrative levels based on the integrated system, method.

Harmonious society is a complex and huge system of self-organization.

MDO is regarded as an effective and prospective solution to complex engineering systems such as spacecraft design.

The methodology is to use the information entropy to measure the risk degree of complex engineering system, and evaluate its relativity with information density evolution.

Several new application fields of complexity science are introduced in this paper, including the complexity problems in man-made complex engineering system, international security & arms control system and electronic information system.