The LIDOS.RFQ.Designer code package gives users the possibility to proceed successfully from input data up to RFQ channel design and space-charge-dominated 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 second-level 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.