The LIDOS.RFQ.Designer code package gives users the possibility to proceed successfully from input data up to RFQ channel design and space-chargedominated beam simulation. The code main feature is a maximum of scientific visualization for each calculation step. The package contains codes with three levels of mathematical model complexity. The first-level codes make not only a preliminary choice of the main parameter arrays on the basis of a simplified physical model but also chosen design optimization. In the case of high-current CW RFQ radiation purity (minimum of lost particles) is considered as the main optimization criteria. The secondlevel codes are used for RF field calculations taking into account the real shape of the RFQ vanes. The third-level codes are based on complex PIC-models that are needed for beam simulation in the chosen channel version.