The Sun maybe is the most important thing in human life, which is we cann’t say more about. The sun is a very vital problem in our way to the unknown world. We have to face this challenge. Although it is the nearest star to earth, we know only a little about it. As the ground and space observations are make progress everyday, we get more and more high cadence data. We believe finally the whole questions of sun can be answer. In this paper, We study in some filament eruptions and flares by using multi-wavelength observations, and get a few results which is helpful to understand the nature of the sun. It ‘s structured as follow: In chapter one, on the base of surveying a number of references, we summarized the basic knowledge to filaments and flares, and discuss the relationship between them. In chapter two, We analyzed multi-wavelength observations such as Hα, EUV and soft X-ray, to study the eruption of a small filament. we find several similar characters between small filaments and large-scale filaments. It is clear that observations of small-scale filament eruptions could help in clarifying the questions of large-scale one. In chapter three, By using Hα, He I 10830, EUV and soft X-ray (SXR) data, we examined a filament eruption occurring on 2006 January 12. The event was associated with a tow ribbons flare, two transient coronal holes (TCHs) and a partial halo coronal mass ejection (CME). This small events which cause a partial halo CME can be a great help to understand the relationship between those whole solar activities. Finally, we describe the conclusion from the above studies and the future of our work.
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