Abstract: A portable and accurate neutron ambient dose equivalent (H*(10))/spectrum monitor instrument was designed based on three microstructured detectors. The detectors were embedded in different depths along the cylindrical high density polyethylene moderator and their count rates were recorded simultaneously. Besides, neutron H*(10) and spectrum calculation method were designed. H*(10) measurement was based on least relative error squared method, combining the response curves of detectors to approximate standard dose conversion coefficient (DCC) curve. And spectrum measurement was based on novel general regression neural network (GRNN) unfolding algorithm. IAEA radiation environment was used for test, and the mean relative error of H*(10) calculation result is only 8.58%. The instrument was calibrated in Am-Be reference radiation field. The relative H*(10) measurement error is within 10% at three measuring points. And the spectrum unfolding results are close to reference spectrum. The simulation result shows that applying absorber shell can effectively improve the angular response performance.