中文摘要：

极值优化算法是一种新的、通用的启发式优化方法。其基本思想是更新适值最差的变量，提高目标函数的适值。极值优化算法（EO）由于它的简单易于实现和强大的功能，已受到学术界的广泛关注。介绍了基本的EO算法、若干类改进的EO算法及其原理和应用，并讨论将来可能的研究内容。

英文摘要：

Extreme optimization is a new general-purpose heuristic optimization approach . Its principle is to select and update the worst variable, and improve the fitness of the whole problem. Extreme optimization algorithm has become the hotspot of evolutionary computation because of its excellent performance and simple for implement. In this paper, classical extreme optimization algorithm and its several variants and its mechanism and some applications of the algorithm are introduced, future research issues are also discussed.