Ancient Israel offering system is a complicated system. Apart from its holiness, it is also similar to taxation system. The similarities between Israel offering system and taxation system lie in two aspects: firstly, Israel offering system has similar functions with taxation system; and secondly, Israel offering system took the characteristics and nature of ancient taxation system, thus it almost can be seen as the early form of taxation system. However, the real reason behind their similarities is that the theocracy's interference into worldly affair forces Israel offering system, which supports the theocracy system, economically to expand its functions.