Abstract. Narrow-line Seyfert 1 galaxies are identified by the unusual narrowness of their Hβ lines. They are believed to be powered by supermassive black holes (SMBH) of relatively small masses, with high accretion rates, possibly close to the Eddington limit. Furthermore, NLS1 have long been known to be characterized by extreme properties of their X-ray emission: a strong soft excess in the ROSAT soft band 0.1 - 2.4 keV, unusually steep X-ray spectra in the hard X-ray band 2 - 10 keV, and very rapid and large variability. We undertake the spectral and temporal study of Mrk 110 which is a low redshift (z = 0.03529) X-ray bright NLS1s. The analysis will be carried out on the XMM-Newton and Suzaku observations of this source. Study of cross-correlation between different energy bands will further help us to understand the underlying physical process.