this talk will focus on my works on mean-field models for chemotaxis based on kinetic theory, including pathway based mean-field models, augmented keller-segel model for e. coli chemotaxis, and an asymmetric model for biological aggregation. i will give mathematical derivation of the mean-field models by taking some proper moment closure of kinetic biological systems. building biological mechanism in the models are essential to capture some interesting swarming phenomena, for example, phase-delayed traveling wave (memory effect) and soliton solution (asymmetric sensing). connections to the chemotaxis model proposed in [g. si, t. wu, q. quyang and y. tu, phys. rev. lett., 109 (2012), 048101] will be also discussed.