There are two different theoretical hypotheses have predicting the relationship of pairing process between belief processing and logic processing in reasoning.The relationship of sequence processing, represented by Default - Interventionist Model. And the relationship of parallel processing, represented by Parallel Competition Models and Hybrid Model. However, These theoretical hypotheses are difficult to explain why the relationship of sequence processing and the relationship of parallel processing are both supported by empirical research. Because these are focus on the phenomenon how to cooperate and transform between processing processes of the belief and the logic. Dual Structure Model of Item and Reasoner’s reasoning Knowledge holds that reasoning process are dynamic processing processes with the variety of the object structure of reasoning item and the Reasoner’s subject factors. And it has been indirectly found that the object structure of reasoning has a dynamic effect on the cooperation of two kinds of processing processes. □□The purpose of this study is to proof whether the reasoning subjective factors lead to the dynamic variability of the cooperation and Transformation between the two types of processing processes, so that to verify whether there are variability in the relationship of pairing processing between the belief and the logic in reasoning. The experiment will examine whether the process of belief and logic in the initial stage of reasoning cognition have speed-asymmetry of processing with the change of subjective directing. And in this study, the subjective directing of reasoning will be operated by instruction. □□Hence, focusing on the early stage of cognition, construction of 3 (instruction: undefined, logic, belief) × 2 (belief: believable, unbelievable) × 2 (validity: valid, invalid) within - subjects design. participants were asked to solve syllogistic reasoning according to the instruction requirements. Among three kinds of instruction, undefined instruction does not indicate reasoning clue, belief instruction require participants to judge reasoning based on knowledge and experience in the real world, and logic instruction requires to determine whether there is a necessary relationship between premises and conclusion. □□The results showed that the instruction, validity and belief have significant effects on the acceptance of the conclusion. The interaction effect between instruction and validity are significant, interaction effect between instruction and belief are significant, and interaction effect between instruction, validity and belief are both significant. Further analysis found that under the instruction of undefined, the conclusion acceptance rate are affected by the interaction between Logic and belief. Under the instruction of logic, the conclusion acceptance rate are affected by validity and belief. Under the instruction of belief, the conclusion acceptance rate are only affected by the belief. □□We can summarize that the reasoning process of participants are different the change of the instruction requirements in the initial process of reasoning cognition. Therefore, It shows that there are dynamic variability in the pairing processing of the belief and the logic in reasoning. And there are different processing relationships due to the change of subjective directing. We also believe that this result supported the prediction of Dual Structure Model of Item and Reasoner’s reasoning Knowledge, which reasoning subject affects reasoning process.