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Phase \RNum{2} of the LAMOST-{\sl Kepler/K}2 survey (LK-MRS), initiated in2018, aims at collecting medium-resolution spectra ($R\sim7,500$; hereafterMRS) for more than $50,000$ stars with multiple visits ($\sim60$ epochs) over aperiod of 5 years (2018 September to 2023 June). We selected 20 footprintsdistributed across the {\sl Kepler} field and six {\sl K}2 campaigns, with eachplate containing a number of stars ranging from $\sim2,000$ to $\sim 3,000$.During the first year of observations, the LK-MRS has already collected$\sim280,000$ and $\sim369,000$ high-quality spectra in the blue and redwavelength range, respectively. The atmospheric parameters and radialvelocities for $\sim259,000$ spectra of $21,053$ targets were successfullycalculated by the LASP pipeline. The internal uncertainties for the effectivetemperature, surface gravity, metallicity, and radial velocity are found to be$100$\,K, $0.15$\,dex, $0.09$\,dex, and $1.00$\,km\,s$^{-1}$, respectively. Wefound $14,997$, $20,091$, and $1,514$ stars in common with the targets from theLAMOST low-resolution survey (LRS), GAIA and APOGEE, respectively,corresponding to a fraction of $\sim70\%$, $\sim95\%$ and $\sim7.2\%$. Ingeneral, the parameters derived from LK-MRS spectra are consistent with thoseobtained from the LRS and APOGEE spectra, but the scatter increases as thesurface gravity decreases when comparing with the measurements from APOGEE. Alarge discrepancy is found with the GAIA values of the effective temperature.The comparisons of radial velocities of LK-MRS to GAIA and LK-MRS to APOGEEnearly follow an Gaussian distribution with a mean $\mu\sim1.10$ and$0.73$\,km\,s$^{-1}$, respectively.

Phase II of the LAMOST-Kepler/K2 survey. I. Time series of medium-resolution spectroscopic observations