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The World Cultural Heritages are increasingly threatened with destruction by traditional causes of decay and socioeconomic development. The World Cultural Heritage in Hue, Central Vietnam is not an exception. In conservation management of the World Cultural Heritage satellite high-resolution images are among the sources providing detailed information on sites, monuments and/or their surroundings for assessment of the impacts of time and socioeconomic development on the site and monuments. The Complex of Monuments in Hue has been recognized by UNESCO in 1993 thanks to its specific features of Geomancy and architectural landscape. As such, these features are the targeted subject of local conservation management. This paper aims at testing six models of fusion CA, IHS, WT, GS, BT, UNB to find the most appropriate for information extraction from the optical image provided by the Vietnamese satellite VNREDSat-1 for monuments conservation management purpose. Two Monuments in Hue with two architectural concepts have been selected for this test, Hue Imperial City and the Tomb of the King Minh Mang. The results show that UNB model is appropriate for fusing 10 m multispectral data with 2.5 m panchromatic data of VNREDSat-1 for the extraction of water, vegetation and built objects and their spatial arrangement patterns inside the Monuments. The test on two architecturally representative monuments shows that object features extracted from the fused data are detailed enough to satisfy information requirement of conservation practice in Hue focusing mainly to protect the integrity and the authenticity of the monuments.