Higher requirements for rational utilization of indoor wireless communication network resources are put forward due to high user mobility, high service quality and high business demand in the large indoor spaces. Access point assignment for hybrid Li-Fi and RF indoor networks is studied. Based on the dynamic application scenario with movement of users and changes in the number of users, a conversion threshold is introduced to determine allocation of APs and two improved methods of AP allocations, dynamic threshold and minimum data rate constraint, are proposed under the condition of considering the handover overhead. The experimental results show that in the same application scenario, the proposed AP allocation methods improves the outage probability performance by 4.66% and 8.50% respectively and improve 1% outage data rate by 3.21 Mb/s and 9.09 Mb/s respectively compared to the AP allocation method with fixed threshold. In addition, simulation analysis show that data rate requirements and the maximum number of randomly generated users can significantly affect outage probability performance.