As an important reservoir type, deepwater turbidity channel system is attracting more attention from the oil industry for its potential hydrocarbon reserve. At present, though a series of achievements about architecture model of turbidity channel system have been obtained abroad, some problems aren’t resolved. ① The hierarchical division scheme of architecture is not perfect and the architecture units of different hierarchy aren’t defined precisely. ② Architecture model in the scale of a single microfacies and the scale of the elements in a microfacies are not clear.③ The existing researches on architecture model are mainly about the qualitative analysis. Compared with abroad, the correlational research only at the beginning stage in China. In this paper, taking a deepwater area in the Niger Delta Basin, West Africa as an example，quantitative to semi quantitative architecture model of turbidity channel system is researched using plenty of high quality data. Architectures of turbidity channel system can be divided into seven hierarchies. Single channel, channel complex and channel complex set are architecture units from the 3rd hierarchy to the 5th hierarchy. The width of single channel has a positive logarithm relationship with its depth. In contrast with meandering river, the sand body of single channel deposits in the axis of it as the mode of vertical accretion. According to filling difference of lithologic facies, single channel can be divided into 4 types which have evolution rule in space. According to external morphology and boundary characteristic, channel complex set can be divided into 2 types, namely confined complex set and non confined complex set. Channel complex has 5 distribution patterns, which distribute in the interior of complex set. Its width has a positive power relationship with its depth, but this relationship in the straight section is not the same as that in bending section. The research in this paper has significant meaning of theory and practice, because not only geological theory of turbidity channel system can be deepened, but also the risk on exploration and exploitation about this type of reservoir can be decreased.