当今宇宙的加速膨胀，已经被Ia型超新星，宇宙微波背景辐射及宇宙大尺度结构等理论及观测结果所证实。在过去几十年的高质量宇宙数据面前，我们不得不承认宇宙中存在一种未知的其性质与一般物理原理相违背的能量，我们称之为“暗能量”，并且恰恰是这种“暗能量”主宰着当今的宇宙，造成了今天宇宙加速膨胀的结果。本文利用248个天体的无量纲坐标距离及其红移量对 及 ：三种XCDM 暗能量模型进行了观测限制。对于 模型，本文根据CMB的测量结果，先验的采用了k= O的平坦宇宙模型，得到的结果为 ，支持Phantom 模型；对于 及 模型，本文根据WMAP 公布的数据又加上了一个先验假设 ，得到的结果分别为 的结果支持精灵模型及精质模型， 的结果同样支持精灵模型及精质模型。

The acceleration of the universe at the present epoch can be studied using a variety of techniques such as type Ia supernovae, and studies of cosmic microwave background radiation combined with large scale structure studies. The high-quality cosmological data, which became available in the last decade , have thrust upon us a rather preposterous composition for the universe which poses one of the greatest challenges theoretical physics has ever faced: the so-called dark energy. Here, we use a total of 248 coordinate distances that span the red shift range from zero to 1.79 to make some constraints on three XCDM modes： and .We have considered the results which were provided by the WMAP, and made a assumption that the universe is flat when we deal with the mode. The result is which supports the Phantom . When we deal with the other two modes , we add one more assumption that , which is also from the WMAP . Then we got the results tha , from which we can see that their results both support the Quintom and Quintessence