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We present the analysis of archival data from ROSAT and ASCA of aserendipitous source PKS 2316-423. According to its featureless non-thermalradio/optical continuum, the object has been assumed as a BL Lac candidate inthe literature. It was evident variable over the multiple X-ray observations.Specially, a variable high-energy tail of the synchrotron radiation isrevealed. X-ray spectral analysis provided further evidence of itssynchrotron-nature broad-band spectrum with steep and down-curved shape in therange of 0.1-10 keV. Further SED analysis suggest that it is a very lowluminosity ``intermediate'' or high energy peaked BL Lac object. Given theunusual low luminosity, the further studies of PKS 2316-423 might give clues onthe evolution properties of BL Lacs.

ASCA/ROSAT observations of PKS 2316-423: Spectral properties of a low luminosity intermediate-type BL lac object